If the US pulls out, we can pull out too. Russians are going to crush the YPG.
They can see that YPG is an American puppet. They aren't stupid.
Our continued presence might trigger them to support YPG though, because naturally, we're a bigger threat.
"Denize düşen yılana sarılır" as the saying goes.
before you write something like that, you should consider:
A) Is the YPG a terrorist organization for the Russians? ...
ANSWER NO !! YPG has official representatives in Russia !!
B) Is the YPG legal and discussion party at the table for Russians?
ANSWER YES !!
Russians even insisted for a very long time that YPG the PYD take part in the peace negotiations in Switzerland.
C) Do the Russians want to see the YPG, under international law an otonomos part of the Syrian?
ANSWER YES !!
For the Russians, restructuring a federated state is quite doable and acceptable as the national state of Syria according to the example of the Russian Federation.
Should the USA withdraw from Syria, Turkey has to decide: SYRIA or AZARBAIJAN. Both are not possible.
One thing we shouldn't miss:
Wherever Turkey did something, they saw Turkish soldiers opposing them and bled. Russia and his mercenaries. In LIBYA, SYRIA, and AZARBIJAN, Russians opposed Turkey. No American, no English, no French ... just Russians.
If Turkey should make a decision Azerbaijan or Syria. The decision is clear for Azarbaijan. But which would Russians choose SYRIA, ERMENIA, GEORGIA, UKRAINE, LIBYA .... MEDITERRANEAN, AFRICA ....
only one is possible!!