Why did muslim people in the middle east and other parts of asia experience hardship during the time of the european middle ages?

Atheir leaders, muslim nobles, forced mostmuslims to be serfs.

Bbyzantine christians forced their religion on muslim people throughout the region.

Cthey were repeatedly invaded and conquered by mongol armies from central asia.

Dwestern european crusaders conquered the muslim empires and enslaved most of the people?