The Rambam wrote that Jews under the Muslims were persecuted far more than any other civilization in history. He lived well into the era of crusades and Christian persecution.
Any historian can tell you as a matter of fact that up until the holocaust, Jews in Europe were treated exceedingly better than those in Muslims lands. You don’t learn about Muslim persecution of Jews because it was so constant and brutal, that it wasn’t limited to specific events. The corruption, extortion, injustices, the stifling of all cultural and economic development, and the frequent slaughters and executions were a normal and constant routine. However, in European countries (even in the more backwards regions of Eastern Europe) the severe persecutions were limited to sporadic events. Jews did have the benefit of lawful governments and relative stability.
This is precisely what enabled the Ashkenazi population to explode from barely more than 1 million in the year 1800 to over 13 million in the 1930s. Sfardim increased from less than 1 million in 1800 to about 5 million in the 1930s (and that’s already many decades after being under European influence and colonization).
Learning history from your high school rebbe doesn’t always work out. (Unless you have a history class from Rabbi Langer.) But reading actual books discussing history will maybe help you get rid of the psoles