Jews were about 20% of population in Poland before WW2. Some cities, like Krakow or Lodz, this number was closer to 50%.
Go to Arizona or California and tell me if it is difficult to find people who hate Latinos who don't make even such a big minorities there as Jews used to in pre-war Poland.
This has nothing to do with Jews specifically. Look at this how Arabs are treated in France (Paris) or London.
Once a group that has different language, religion, customs, and its own ghettos is large enough - my guess about 1/3 of total population - the natives will react the way the do. Poland or US, doesn't matter.
Go to Arizona or California and tell me if it is difficult to find people who hate Latinos who don't make even such a big minorities there as Jews used to in pre-war Poland.
This has nothing to do with Jews specifically. Look at this how Arabs are treated in France (Paris) or London.
Once a group that has different language, religion, customs, and its own ghettos is large enough - my guess about 1/3 of total population - the natives will react the way the do. Poland or US, doesn't matter.