So what? When the western-most provinces of Russia itself start revolutions to liberate themselves from Moscow, and promptly apply for NATO membership, will that also be NATO's fault; will you still refuse to see that it says more about Russia?
Russian aggression is "reactive"... To the reactions to Russian aggression.
I'll make no judgment as to whether Crimea and its people are better off as a part of Russia or Ukraine (they very well might be better off a part of Russia), but invading and annexing is just not ok. (Same as if China decided to do the same to Taiwan.)
I just don't see the problem with NATO expansion. As a parent poster pointed out, it's a defensive alliance; if Russia has a problem with other countries promising to defend each other in the case that Russia wants to get aggressive, that's, well... Russia's problem.
You have the chronology exactly backwards.
And for about half of the USSR's existence before it collapsed... Possibly more of it than it was Russian?