Regrettable, but largely peaceful political conflict over resources and opportunities or simple separation between groups tended to get painted as hatred because of what happened during the war. I'm not saying everything was fine before, but conflicts that might have been peacefully resolved or superceded are seen in a different light because of the German intervention.
Moreover, Eastern Europe saw a more general war of nationalities -- not just betweem Germans and Jews, or Germans and Poles, or Poles and Jews. There was widespread warfare and killing between Poles and Ukranians and I believe Russians and Ukranians, as well as between different Russian factions, competing Polish groups (which had varying attitudes towards Jews), and conflicting Ukranian movements.
In the East, the Holocaust took place in an enviroment where warfare between different groups was general. Things never went so far in Western Europe (in spite of fighting between collaborators and the resistance in various countries).
In some contexts I think it is fair to generalize about groups “hating” each other... Palestinians & Israelis... the Sinhalese & the Tamils... N. Irish Catholics & Protestants. And so on.
A pogrom isn’t exactly what you would call a political conflict.
The Holocaust against Jews (and Gypsies) was quite distinct from whatever wars between Eastern European nationalities or nations that you are referring to.
I don’t see what point you are trying to make.