So from 600 to 1600 Europe other than Spain was a “dark ages sump” and it was because Jews were left in peace to prosper by Muslims that Spain wasn’t a dark ages sump? I think you are either completely not worth talking to or are seriously off your “game” right now.
Like, if all we do is look to the way human wastes were handled, and made our judgment on that, Spain was pretty decent, Venice less so, and most the rest of the territory really bad.
China took 300 years to begin its recovery from the climate catastrophe of 535AD ~ so it was nasty there for a long time too.
BTW, the Moslems and Christians in Spain did not always leave the Jews alone to prosper. Like Democrats they regularly inflicted a severe Depression on "the rich Jews".
If you want to believe Europe was a shining city on a hill during the Early Middle Ages go ahead ~ dream on. It was a dreadful place. They'd even stopped using gold and silver
For various periods of time especially in Andalucia southern Spain it was conquered and reconquered by the Almohed and Nasrid and Almoravid and other dynasties. Some of the emirs and kings were radical Muslims; some were not. Some allowed Christians and Jews to study and prosper in universities in places like Cordoba and Granada. Just like some medieval kings of Europe were better than others. However in the 800’s to 1200’s for the most part southern Spain was known as a place of learning and new ideas some that even challenged Muslim thought at the time. Moorish craftsman even built elaborate synagogues that still exist. On the east side of the Mediterranean it was a different story however.