Crimea was Russian and voted to join Russia. Illegal wars are what the US wages around the world. Russians are helping the insurgents unoficially because Nuland and that scumbag US ambassador placed a Nazi Junta in power.
1. Crimea was Ukrainian from 1954 until Russia's invasion.
2. The election held after Russia invaded was neither fair nor free. Non-citizens were allowed to vote and militias coerced voting.
At the 1991 referendum, even in Crimea a majority voted for independence. I'm sure that that referendum was a lot less rigged than last year's one.