Lol! Let’s make it simple. If Turkey does this, it’ll likely start a war. Which cites are you going to let burn for the Crimea? Starting a war with a nuclear super power isn’t a great idea
No one is talking about a war- yet. Why isn’t Putin afraid of a nuclear war? Anyone rational knows that barring an attempt to destroy one of the major powers they will not be used. Putin knows there are lots of people in the West who think as you do, so he feels free to do as he pleases, whereas I think we should call his bluff, for example, by declaring the independence of the Republic of Kaliningrad.