It is not just a "Muslim thing;" it is about invidious cultural practices within what is a tribal, collectivist, and authoritarian matrix. Islam happens to be a particulary obvious and dramatic example, that's all, as well as one growing in political and economic sway.
"Fairly rare incidents" of cultural malfeasance? Now that is absurd. There is nothing "fairly rare" about the pervasive acts of brutality, terrorism, and prejudice we see in more than one alien culture.
Because we have a Constitution we are not required to be stupid and blind. This is not about religious freedom, it is about what constitutes viable religious practice and what kind of impact a "religion" can have on the body politic.