But the problem isn't Pakistani people, the problem is that the culture they were brought up in is sexist. We don't need to get rid of multiculturalism; there's a lot of evidence that second-generation and third-generation immigrants' views shift, as the generations go by, towards egalitarian.

And how would we define "Pakistani culture" in such a way that it doesn't necessarily include patriarchy? Cultural evolution in response to moral imperative is a thing.