If they weren't congregating in cities they'd find other places to congregate, unfortunately. Although maybe the impact they have on politics wouldn't have been quite as significant if they'd been forced to live in more isolated and rural areas.

Granted though, it could easily be argued that their significance in politics was largely fabricated and built up through leftist-degenerate propaganda for a number of decades. So they could cultivate it as a political wedge and a cancer they can spread. And likely more.