>>11709608it's the result of massively opening influence
some manifest destiny WW1 and WW2 save the day stuff
FDR was pro-invterventionalist and america had to be this role model
everyone saw the opportunity, "american dream" and moved in
then red-scare and rising fear of "different" minded people, JFK tried to limit immigration, he got shot
there's just too much responsibilities for too much different people honestly