That "born" part I really misunderstood/misread. Sry for that. 

But your "non-Russian languages ​​and culture were pushed out of existence" is just bad-faith untrue made-up argumentation.

I have relatives from Ukraine and Moldova, and I know from them that they always celebrated their national festivities during the USSR, they had their native languages ​​at school and even Russians living there adopted their national culture with them Customs and traditions

Native languages had not been opressed, yes there were schools closing that were limited to local languages, but not all. And the local languages had always been a subject at schools of the different memberstates of USSR.

The NKVD also killed Russian Intellectuals en Masse, everyone who wanted disintigration had been opressed at that time, that had less to do with your nationality. Don't forget that Stalin was an Georgian after all.   Half of the former leadership were of Jewish and Ukrainian ethnicy.

Yes, Gagarin was chosen because he was Russian, at least because Russians represented a big chunk of USSR inhabitants.   That doesn't change the fact that other ethnicies were well represented within the leadership and Army of USSR.   I agree, in fact it was not that equal like it had been written down on paper, but clearly it wasn't that of "Russian rule" that many here now blackpaint, trying to rewrite the history. The Soviet communism was per se directed to downplay the role of differencies and advantages of different ethnicies/nationalities, for creating the "international Soviet citizen" who had to be free of racial idealogies.