Only one problem. Enforcing a no-fly zone against Iraq was easy, and they pretty much allowed it to happen. Enforcing a no-fly zone against Russia would be essentially impossible unless the Russians agreed to join in.
Does anybody seriously think that the Russian military couldn't, if they wanted to, create a giant mess in the middle east? What would the UN do if, for example, Russia declared a no-fly zone over the area itself? Or perhaps a no-ships zone off the coast of Syria. Short of a war how would the UN stop them?
For that matter Russia could just turn off the natural gas pipelines to Europe and leave the UN and EU trying to figure out how to keep their citizens from freezing to death.
The whole idea is crazy.
Russia and the US coexisted with US Military presence in N. Syria for a number of years. The only incidents (one was extremely bad) were caused by Iranian Quds forces and Russian Contractors (Wagner Group). Would not have happened with Russian intent.
We had de-conflict arrangements with the Russians that largely worked. Turkey did shoot down a Russian jet (again) during that.
Turkey has never had any intent to take out ISIS. They employ them. That became crystal clear during the Efrin takeover. That was a deal done with Russian permission. We did not act to protect the Syrians then.
Turkey under Erdogan has never been ally of the US or the West.
The EU? Headshake. They have already taken the poison pill.
We will see if they survive it.