Why is anybody surprised over this. This is Georgia all over again except problem is Russia has a large Naval base in Crimea they dont want to lose access to which is likely to happen if Ukraine goes EU.. The bigger concern Putin has is the very possibility that Ukraine could join NATO which would be a major shitstorm for the former communist KGB insider. Additionally with Obama having ZERO backbone credibility over his bullshit with Syria and the redline crap among other things Putin basically lets anything Obama says go in one ear and out the other as the bullshit it is..
This all came about simply because Putins little puppet jumped the shark and decided it was smart to start shooting protestors with his little special police (gestapo) force. The final straw was when one of the police snipers shot an innocent medic who was there to provide first aid and nearly killed her. Besides lets not forget the face of the Opposition/Pro Western folks is none other then one Vitali Klitschko 1/2 of the brothers who've run roughshod over the Heavyweight division in boxing and is seen as a huge public face for Ukraine and probably possibly the likely new President of Ukraine once elections are held.