1) If Turkey chooses to work with Assad to fight PKK
Then Turkey has no right complaining about US work with SDF/YPG
If Turkey Accepts a man who killed a million people just to forward its interest then it is just as bad as the other hypocrites
The Assad authority is internationally and legally recognised by the UN, unlike the PKK terrorists.
Apparently, you care the career of Assad more than the national interets and the future of Turkey and 80+m Turks and ready to sacrifice them to see Assad's career failure.
Let's try it again:
Who is the primary enemy of Turkey... Assad or PKK?
Who wants to divide Turkey... Assad or PKK?
Who supports PKK... Assad or USA?
2) where was that UN recognition when 4 countries are bombing Damascus whenever they felt like it
Israel by now probably considers Damascus as no more than a target practice
The UN and Int. Laws are there, so are the national interests of member countries.
Let's try it again:
Who is the primary interest of Turkey... Assad or PKK?
Who wants to divide Turkey... Assad or PKK?
Who supports PKK... Assad or USA?
3)Assad has no problem with SDF/YPG all his movements and actions on the ground indicates he is trying to win them on his side undermining the US so why would he help Turkey and FSA won't be happy about any possible cooperation between the two so reality at the moment just dictate the impossibility of your scenario
What does Assad fight for, and what does USA/PKK fight for?
Let's try it again:
Who is the primary enemy of Turkey... Assad or PKK?
Who wants to divide Turkey... Assad or PKK?
Who supports PKK... Assad or USA?
4) Who told you Assad didn't attack Turkey ??? Are those Assasinations and bombings in Idlib And Afrin undermining Turkey's influence are done by Ghosts ??
Sdf/YPG has a role sure but it's only access is through Assad territories free bombs transit anyone ??
There is no cities inside the border of Turkish Republic, therefore Syria has never and ever attacked Turkey. Those attacks in Syrian territory are both legal and illegal, so is the answer.
Given the alliances in the Syrian conflict, Will you please tell me whereabouts of the influence of Turkey other than 5+ millions of Syrians influence in Turkey?
So,
Logically Whom you think Turkey should make legit co-operation for the interests of Turkey in short, simple and cost/risk low way... Assad or USA/PKK?