Cb, you have no real knowledge of Ukraine, Russia or anything, do you?
No one really thinks the Crimean vote was rigged. Believe it or not, Putin is a very popular president of the Russian Federation. Yeah, some hate him but he has widespread popular support.
In Ukraine, many are native Russian speakers, and the languages are not that far apart. Moreover, parts of the current Ukrainian boundaries were Russian territory, populated by Russians, and as far as Crimea, Khruschev gave that to Ukraine in 1954.
There's a lot of history and won't try to explain it all going back centuries but Crimea, for example, was Tatar (Muslim) and Stalin decimated the Tatar population and repopulated it with Russians (not Ukrainians). It's not really Ukraine except by some arbitrary act (Kruschev).
Other parts of Ukraine have been historically Russia. Here's an article from Pravda on the Potomac, which despite it's typical propaganda, tries to explain the history. I only share it since you won't read non-propaganda sites.