What event discriminated against jews?
The Hadrianic persecution, when Rome, under Hadrian, killed an estimated half-million Jews and enslaved many (quite probably another half million)? Or do you mean the Crusades, when most of the Jewish communities of the Rhineland were destroyed, driving Jewish refugees east into Poland? Or do you mean the Bubonic Plague, when Jewish communities across Europe were murdered or expelled for causing the plague? Or do you mean the expulsion of Jews from England in 1290? Or do you mean the expulsion of Jews from Spain in 1492? Or do you mean the expulsion of Jews from Lutheran lands in Germany during the Reformation, which drove more Jews into Poland? Or do you mean the Khmelnytsky Uprising in Poland, which decimated the Jewish community in what was then Polish Ukrane? Perhaps you are referring to the pogroms, anti-Jewish rioting encouraged by the Russian governments between 1880 and 1920 that drove millions of Jews to flee to Western Europe and the Americas? Or do you mean the Holocaust, orchestrated by Nazi Germany?