[Simorgh]

I've not heard of this letter - and would also be curious to read it!

Al-Andalus (Muslim Spain) is considered religiously tolerant by modern historians in the context of the experience of Jewish citizens, especially when compared to contemporary parts of Western Europe.

As an example, it seems there was an expulsion of around 100,000 Jews in Christian France in 1306 and in England in 1290 of several thousand. I've not come across any such comparable events in my readings of Al-Andalus.

As a direct point, if Maimonides thought that France and so on would have offered more freedom or a better quality of life, then he could have moved there when Cordoba was experiencing political turmoil. He instead migrated through the Maghreb, towards the Middle East - it seems he was employed by Saladin at some point.