Russia places a few S300 batteries in Syria and now you have a no fly zone from Turkey to northern Iraq and all of Syria. End of game and Putin has balls to do it and now Turkey given a good reason for Russia to arm the Kurds heavily. We should already have been arming the Kurds.
Kurds are just more moslems. Isolate the entire area, and let them figure it out.
Israel, and possibly the US, would knock those batteries out almost immediately - regardless of losses.
Sorry resident Putinista’s, but no, Russia can’t set up a no-fly zone of Syria.