Yeah it's a weird phenomenon
Rock, scissors, paper... HELVETE!! LOL
As father Isakowicz-Zaleski said, in mixed marriages (Polish-Ukrainian) the Nationalists forced the non Polish person to kill his/her spouse and children, a method the Nazis or the Soviets didn't even use.
So what's your solution? More hate?
Numerous Tsars managed to rule over the occupied territories by deflecting the hate the oppressed felt to a hate of everything and everyone different. To stir up the nationalistic and the religious fervor amongst the worker bees was a brilliant move by the Russians.