Many Christians, even fundamentalists,  and Catholics are perfectly nice people, few would deny that. That hasn't stopped criticism of Christianity in general and fundamentalist Christianity and Catholicism in particular, and particularly of their socio-political impact on our or American society.

So the fact that I know perfectly nice, fine Muslims socially, has no impact on what I think of the religion in general, and more particularly of its extremist version, and the socio-political impact it can have on our society when its practitioners become more and more numerous and politically influential.