I think you're both a little wrong. The ideology isn't collectivist, it's pseudo-collectivist. For example, as a foreigner who finds ethnic "identity politics" rather natural, I'm completely befuddled by what passes for "identity politics" in America. It's not collectivism where everyone all the Muslim kids line up in their tribe and follow what the patriarchs and matriarchs say. It's a hyper-individualistic cosplay of collectivism. "Proud Muslim Americans" wear their identity on their sleeve and complain about "white people" and "Islamophobia," but their beliefs and causes align with those of their white progressive friends, not other Muslims.

This, incidentally, makes the movement seem much bigger than it is.