Part of the problem for them was that they never quite got the narrative under control for Muslim criminal behavior. For blacks, they managed to push it under the rug, so stuff like black men being shot more often by cops could be spun as victimization, and the evidence otherwise was racism. I think, in part, it was because most violent black crime is towards other poor blacks, out of sight of progs, where Muslim crimes couldn't be hidden away. It's rather hard to bury a bunch of truck attacks, or grenades through windows, or missing white children. It made it too difficult to get the innocent minority victim story to stick.