Hopefully, since it's people are Russian. The world learned the wrong lessons from the Munich failure.
The Tatars are the indigenous population, and they do not approve of coming under Russian rule.
They are about 12% of Crimean population.
There could be a deal to get Russia to withdraw from Crimea and Ukraine in exchange for an investigation into the legality of the deposition of Viktor Yanukovich. Either way, the seizure of land by brute force away from the sovereignty as recognized by the UN is unacceptable.
No way. Without a war, Russia wouldn't bring Crimea back. However, there is possibility of a deal about future of Donbass, but it wouldn't include Yanukovich - he is a dead man now, he isn't useful for Moscow and Ukrainians hate him.