That isn’t true.
I recommend “In Ishmael’s House: A History of Jews in Muslim Lands” which documents the sorry state of Jewry living in Muslim lands - pretty much any muslim land - from 1200 AD onwards
Or the first half of “From Time Immemorial” by Joan Peters. In the early chapters she details the treatment of Jews in Muslim lands from 1000 AD up to the rebirth of Israel.
(Scholars frequently find fault with Peters’ demographic analyses of Palestine and Israel - but there are no issues with her meticulous historical treatment of Jews living under the ‘protection’ of Islam.)
These authors do not paint a pretty picture.
With temporary respites under enlightened single rulers, in all Muslim-controlled lands Jews were horrendously oppressed. They were subject to arbitrary murder and confiscation. They were not allowed to witness against Muslims in court. They were subject to heavy tax burdens to support their muslim masters.
The Jews were considered living chattel by the Muslims. If today they could bring them back from Israel, I don’t doubt that they would gleefully ‘protect’ them for as long as they could.
Do you understand the difference between bad and worse?
Jews were allowed to live as oppressed dhimmi in Muslim lands. They generally weren’t allowed to live at all in Christian lands.