Mogadishu is probably a bad example because there are actually an enormous amount of Somali immigrants in the Midwest. But I was really restricting my comment to intra-US comparisons.
You're missing my point. My point is that those places are even more culturally distant from NYC but no one ever tells them to "go back where you came from".
Btw, also a Midwesterner. Recently left NYC. Finally took the advice of the locals.