A lot in your post.
I’ll add that Russia’s antipathy to Turkey arose from “the harvest of the steppes”. Which people can learn of on their own.
Turkey is leaving it’s Europe-centered position (and thus NATO). All that remains to be determined is whether it will be neutral or ‘China-oriented’.
It’s a bridge berween the two. Lots of money to be made by a bridge.
Turkey was also useful as the cork in the bottle between the mostly Islamic Middle East and Europe. The Soviets incited and trained the early generations of terrorists, oh, and armed them. Now Russia's mired in Syria and has no exit plan, other than to retaliate against any local gentry stupid enough to take them on.