If the majority want to exterminate a minority, sure. Democracy doesnt mean that they should be allowed.
If "whatever they want" means independence and self determination then yes, either you believe they should have it or you give democracy the middle finger.
Theres no middle ground there.
Some people think ukraine should be run from Moscow and fuck what anybody in ukraine thinks. Some people think crimea should be run from Kyiv and fuck what anybody in Crimea thinks. They both hate democracy.