So a minority should dictate international relations? A minority that aren't even indigenous and whose only history of statehood was being a vassal of the Ottomans that captured and sold Slavs as slaves... Why should they dictate what happens between Ukraine or Russia?
No one from people not Ukrainians, not Tatars and not Russians had option to decide there future during the occupation process. There were just occupied by Russian military. It was military operation not decision of local population.