/ Polish hatred towards Jews...
osiol: If you want to rule, it helps first to divide.
If you want to keep ruling, it also helps to divide.
Who gets the blame when things are not going well in your country. Certainly not the people in charge. They blame the problems on a convenient minority.
Mugabe blames Zibabwe's problems on white farmers and the UK trying to reestablished a colony. His corruption and incompetence has nothing to do with it.
Idi Amin expelled some 50,000 Indians from Uganda because God told him to do so. Boy, did that solve Uganda's problems.
Prior to WWII German Jew were well integrated into German society. Most considered themselves nationally as Germans and religiously as Jewish or no religion. They had served the German nation well during WWI.
If you don't have Jews, you target gays, or Lutherans, or Blacks or whoever convienent.