And how do we treat them? Genuine interest here.

I spent 16 years in Chuvashia, accasionly visiting Tatarstan and I have to say that I've never seen any bad treatment over there. Chuvash and Tatar langauges were always mandatory in schools, all text in the streets in both languages, local holidays and so on. Chuvash products were and are always on the shelves in Moscow stores. Same for Tatarstan.

At the same time I remember quite well how russians were treated in Tudjikistan (I was born in Dushanbe) back in the late 80s before thje civil war. This is one of the reasons some of minorities originatin from our asian ex-republics and sometimes North Caucasus get different treatment (usually from older generations).

The leader, Akhtem Chiygoz, was found guilty of inciting mass riots protesting the Russian presence in Crimea.

http://www.bbc.co.uk/news/world-europe-41224383

I visited Tatarstan recently, and as a kazakh I find that they have same problem as we do here in Kazakhstan. Tatars who don't speak their own language or poorly(we call them shala).

Well, that's hardly has anything to do with Russia been bad guy, right? :)

Are you serious? Don't you ever heard about policies of Russification?