Is it not also strategic, to get a corridor, one way or the other from Russia, Iran, the Gulf directly to the Mediterranean, another ice free port, a crescent of Shia crescent flags through Sunni territory? A many faceted diamond, the hardest substance.
As much as I hate to see Europe being underwhelmed by a "fleeing" population, I feel for all there, even the young men caught in the middle.
US /Russian air battles ? has happened before, Korea, Vietnam, and probing on coast lines around the world.