The majority of Crimeans retained their Ukrainian passports and were forced to take Russian to prevent possible bureaucratic cavils of the occupation authorities.
All Crimeans, one way or another — people with two passports in his pockets. It’s very speculative comparison, but nevertheless (a Russian passport is) as “ausvays” (an identity document issued by the German authorities — approx. ed.) in the occupied territories during the Second world war. Try without “ausweis” live, if there’s a German administration, and requires all documents. In the same way and there. Without Russian passport you, relatively speaking, to the hospital plainly don’t go, the child in school not issued.
Today official Ukrainian authorities do not have effective levers to influence events in Crimea. I honestly believe that tools in General, Kiev is very small in order to work there.