"Can you believe Russia would invade to get a warm water port?!"
Yes, I would.
Btw your analogy of "why isn't germany authoritarian" is off the mark, because the Russians and NATO completely dismantled the existing power structures post ww2 through force. We did not do anything close to that post cold war. In fact the communist party still exists today in Russia.
Another point is that the US made it clear it would not tolerate an openly authoritarian government in Western Europe but would tolerate far right groups for its own purposes against communism.