The current war in the Middle East is all about this:

Who will control Europe’s energy supply routes.

The 15 July 2016 coup attempt against President Erdogan;
The Syria crisis;
The Qatar blockade;
The Turkey-Cyprus negotiations;
The Turkey-Russia rapprochement/ shooting down of Russian fighter

All of the above are the product of these pipeline wars.

Turkey (really President Erdogan) gave the middle finger to Europe and the US when it in response to the coup signed the Turkish Stream deal with Russia triggering a massive pipeline war. Mr. Putin strengthened President Erdogan’s hand against Europe and the US by agreeing to sell Russian gas to Europe via Turkey as opposed to via Ukraine. In return Turkey abandoned its role in the Western alliance in Syria switching to the Russia-Iran-Syria axis. In response Mr. Trump called for a blockade against Qatar so that it could no longer supply its gas to Europe via Turkey (which would have strengthened Turkey’s position more). Mr. Trump thought Mr. Erdogan would not enter an agreement with Iran in response. Now Qatari gas will go through Iran to Turkey and join with the BTC pipeline. Kazakh gas will also go through Iran to Turkey.

Its just so lame.. US is completely betting on YPG, now that FSA is out flanked and locked tight on Jordan/Syrian borders.
And the US made up “deconflict zones”.. wtf is that about??

This is gonna go from US proxy failure to something worse in Syria.
US cannot invoke Articles 5 in Syria. They cannot get anything passed in UN, should there be any clash of Titans.
Safe to say, US has failed in their ME effort after DS in Iraq.
And likewise Russia and Iran has picked up the pieces. Once ISIS is gone, there will come a Russian, SAA, Iran push against Northern Syria. Might just be that Turkey will join in on this too.

And the most interesting of this, what will the Iraqi PMU army do? So far it looks like they are on SAA side.

Turkey is preparing for something very big. This is evident from the type and number of arms it is procuring/producing. E.g. Why is Mr. Putin transferring S-400 technology to Turkey all of a sudden with a delivery date of 2 years? Russia + Iran + Turkey I believe have a post-war plan for Syria. Each have created safe zones and secured the safety of many displaced Syrians.

What is really interesting is the fact that Turkey is also training about 150,000 Syrian refugees in Turkey. It is essentially forming a Syrian army from its 3 million refugees.

I think it is also safe to assume that Turkey has sided with Russia in Syria now after Washington’s insistence on arming a Kurdish terrorist group against ISIS.

The US has (unfortunately) from time to time worked with various dubious organizations in different parts of the world to reach a specific objective. This does not mean that the US is embracing the long-term goal of that organization. It’s just the “enemy of my enemy” thingy.

I also don’t think Turkey has completely clean hands in this respect.

Turkey, Iran, Russia etc are all sovereign State actors vis-a-vis Syria who each have legitimate interests in Syria recognized under International Law. What business does non-State actors such as the YPG have in Syria?

Turkey has certain rights in Syria under the Treaty of Ankara.
Turkey also has a sovereign enclave landlocked within Syria: the Tomb of Suleyman Shah.
Turkey has a Turkomen minority in Syria that it protects pursuant to old Treaties arising from the fact that Turkey was the former colonial power in Syria.
Turkey has a right to self-defence under international law to prevent cross-border attacks from within Syria.

Russia and Iran have formal Treaties with the Syrian Arab Republic that secure their position as formal allies.
Russia has several bases in Syria.

What business does the US and other coalition forces have in Syria now that the threat of ISIS is being handled by the Russia-Iran-Turkey-Syria mechanism?

Under what Authority does the US Air Force shoot and down a Syrian Arab Republic fighter jet operating within Sovereign Syria?

Why is the US providing air-cover for a non-State actor in Syria? This is a blatant invasion using proxies.

US concerned by Turkish dealings with Russia, but won’t say why
https://www.dailysabah.com/diplomacy/2017/06/19/us-concerned-by-turkish-dealings-with-russia-but-wont-say-why

RAGIP SOYLU @ragipsoylu, WASHINGTON
Published: 17 hours ago

Tillerson’s remarks that the U.S. was concerned with the developing relations between Turkey and Russia was not eloborated on despite Daily Sabah’s insistent attempts.

The remarks came amid growing discussions on the Trump administration’s alleged ties with Moscow.

U.S. Secretary of State Rex Tillerson said last Wednesday that they are concerned about Turkey’s engagement with Russia, but failed to elaborate. Daily Sabah’s further attempts to materialize the cause of these concerns did not bear any fruit either.A spokesperson for the U.S. State Department over the weekend refused to explain why exactly the U.S. was concerned about Turkey’s dealings with its biggest neighbor. The spokesperson said the department had nothing to add on Tillerson’s vague statement.

Tillerson’s remarks are the first reaction from the Donald Trump administration toward the burgeoning Turkish-Russian relationship. A Washington insider said Tillerson’s acknowledging concern about Turkish-Russian engagements was quite entertaining since the Trump administration was accused of colluding with Russia for almost a year now.

Tillerson himself criticized the U.S. Senate for passing rather tough Russia sanctions last week, telling the senators that the bill would preclude the constructive dialogue with Moscow.

There are several rumors that are explaining Tillerson’s remarks. One of them is Turkey’s energy deals with Russia, specifically the so-called TurkStream pipeline that would bring Russian gas to Europe, bypassing Ukraine.

Turkey has also been working with Moscow and Tehran to deliver a cease-fire in Syria, without the U.S.’s blessing.

The pretext was “fighting ISIS”. The real reason is- the creation of a new US-allied State in the Middle East: a marxist-leninist Kurdistan.

Kadir Üstün, the executive director of Washington-based think tank SETA DC, says Turkey had sought to cooperate with Russia in Syria to try and protect its security interests and priorities. Üstün also said that the U.S.’s support for the PKK terrorist group’s Syrian branch has been further straining relations.

“U.S. support for the YPG, otherwise known as People’s Protection Units, has deeply upset Turkey, which is a holdover policy from the [Barack] Obama administration. But the Trump administration’s continuation of the policy is further straining relations,” he said.

President Recep Tayyip Erdoğan declared last month that Turkey and Russia were in the final stage to sign a deal on S-400 air defense systems. The move has already caused widespread backlash among NATO capitals. Ankara’s explanation for this deal is Russia’s competitive advantage over NATO systems, in terms of financing and the transfer of know-how.

“[The purchase] might further strain Turkey-U.S. relations but Turkey is trying to find a solution to threats coming from terrorist groups in northern Syria,” Üstün said.

It is not immediately clear what Ankara’s response will be. But Russian Foreign Minister Sergey Lavrov did not miss the opportunity to comment. He said he was surprised by Tillerson’s statement, according to a report that appeared on Ria Novosti.

“Russia and Turkey, together with Iran and other countries are already working to resolve the Syrian crisis. I do not know which aspect of our rapprochement Rex Tillerson is anxious about,” he said.

However there is a bright side. Tillerson’s remarks last Wednesday also included a highlight on the Trump administration’s approach to Turkey.

Tillerson said the U.S.’s objective was not to worsen the complex relationship but find ways to re-engage and strengthen it so that the U.S. could have some influence over Turkey’s choices, particularly with respect to the quality of Turkish democracy.

There is also some unconfirmed news reports that Turkey is also transferring MANPADS and Roketsan fire and forget anti-tank missiles to the Free Syria Army.

It looks like someone is upset Turkey + Russia + Iran removed the pretext under which the US & Coalition entered Syria.

The de jure pretext was “fighting ISIS”. The de facto reason is for the creation of a US-allied marxist-lenninist Kurdish State on Syrian territory which cuts off Turkey from the Arab and Islamic worlds thereby killing any dreams of a pax neo-Ottomana in the region.