“The status of Dhimmi to which they were subjected differed in no way from that of Christians,”
Not quite correct. Only Jews were blood libeled.
“There was never anything to stop the Jews of Bagdad, Istanbul, Izmir, Salonica, Damascus or Cairo from moving to Palestine if they wanted”
Well. Shabtai Tzvi, the Jewish ‘false messiah’, sought an ingathering of the Jews and a return to the Land of Israel. The Ottoman sultan offered Shabtai Tzvi a choice, convert to Islam or die. Shabtai Tzvi converted.