“The battle would be Turkish tanks vs Russian Air.
Turkey does not have the air power to defend those tanks from the Russian Air Force.”
Russia can’t resupply their forces in Syria by air without flying through NATO air space. They can’t quickly resupply by water without sailing through Turkish waters. And Turkey has far more air assets in the region including enough in air defenses to shoot down anything the Russians put in the air FROM Turkey. This is Turkey’s home field. The Russians are going to avoid direct conflict with turkey there if they can. That’s why they’re starting this whole UNSC circus over the issue.
Russia can fly over the Caspian, through Iran and Iraq to reach Syria.
If Turkey puts their aircraft over Syria, they would be shot down.
If they fire on Russian aircraft from Turkey, it's ON and NATO won't intervene.