If Jews refused to assimilate & lived in their own city & got vast amounts of wealth by honest hard work & then gave a greater percent of the wealth they honestly earned away to Goyim then the percent of the Goyim in the population
If they went around doing free work building houses & gave those houses away to Goyim but did not assimilate & did not try to harm Goyim they would be loved by Goyim
They are hated because they try to harm & scam Goyim not because of non assimilation