The anti-Zionist claims about he Muslims having been such Tzadikim all the years are not true but this doesn’t seem 100% accurate either. There weren’t pogroms and the like in the Muslim countries as often as in Europe. (They did happen but not as often) Shuls were not routinely being turned into mosques etc.
What is the source for the claim that in the 1950s, in Yemen, 50,000 Jews were forced to convert to Islam. I googled it and couldn’t find it anywhere