Of course Russia was also a hurdle Erdogan needed to overcome especially after relations went sour when Turkey shot down a Russian fighter jet over Syria in November 2015…if any US coalition invasion plan was going to work, they needed to deceive Russia and not directly confront them. Therefore begrudgingly, Erdogan made an apology to Russia in June 2016 before the coup. Shortly after the false coup in July 2016, Erdogan played his part to convince Russia that everything was never better between the two nations. Once Erdogan made a few deceptive pledges to gain Russia’s trust, Erdogan invaded Syria in August 2016.
If there was any real connection between the US & the Syrian Kurds, as the US government lets on, then we would have seen the US hold Turkey's feet to the fire by taking action against Turkey to stop their never ending attacks on Kurdish towns. So as always, actions speak louder than empty words...or in this case non actions speak louder than words.