To be fair, legal immigrants from the early 1900s banded together as well.
This is why places such as Red Lodge, MT, in the coal mining region, had a ‘Festival of Nations’ the entire time I was growing up and had a 100% Italian grandmother and a 100% Austrian grandfather who lived their entire lives there.
And why two Sicilian immigrants, one a coal miner, met in Switzer, WVA and became my grandparents.