Truthfully, we should be deporting everyone that immigrated since ~1850s... We don't need the Irish or the Italians here... but to an extent, we kind of already missed that boat.

I think where we can fix things here is to deport all non-Whites. Things truly started to go significantly downhill when both the USA/Canada started allowing non-White immigrants in which was around the 1960s. If we just deport all non-Whites, we can start our society anew.

Also, we should ban immigration entirely. If we want more people in our country, get women back in the household, reliant on men and breeding kids. Let's make things so Patriarchal that women look to A Handmaid's Tale as a better life.