He is going to get away with it. Pootey has been planning this for 5-6 years. He’s not about to let anything endanger his naval port on the Black Sea. He will prolly get Crimea and it will split the Ukraine just like he got Osettia split off from Georgia.
The people of Crimea want to be with Russia. They speak Russion, they are Russian and they want to be part of Russia. The Ukranians hate Russia and they want to align with the EU. So be it.
The Crimean Tatars who were deported by Stalin in WWII wouldn't like it, and they are Muslim.