So I'll just say that if the situation were inverted -- if e.g. Russia was sitting in Mexico "promoting democracy" -- we'd be engaging in "multiple unprovoked invasions" too. Reagan and NATO told Gorbachev pre-collapse that there'd be no NATO expansion in the future. They lied. We've forgotten that. You think the Russians have? Should they?
Furthermore, the situation was inverted -- look at the Cuban missile crisis. Does anyone say that the US shouldn't have threatened to vaporize the island to get the Russians out of there? It's our backyard! Surely we were justified in feeling threatened.
I don't care for the Russian regime whatsoever, and Putin's a little Napoleon-complex turd. A weak, insecure little man. But I'm sorry pal, we're the ones threatening these people in their neck of the woods. NATO should've disbanded the day the hammer and sickle stopped flying over the Kremlin.
My claim is that you'd behave in the exact same way.