Although I do concede that Mormonism is worse with the fabrication that the mark of cain is upon non white people, and that Islam doesn’t really call for discrimination against other races.

I don’t know about minority Mormon sects, but Latter-day Saints do not believe in the “mark of Cain” and do not believe in racial discrimination. We’re pretty big on the “Golden Rule”.

A recent sermon by one of the leaders of the Church on the topic: https://www.churchofjesuschrist.org/study/general-conference/2022/10/28christofferson?lang=eng#p7