Back when the Irish were considered an 'other' and like vampiric monsters sucking all the jobs out of America, there was a period where they slowly started working as pigs (cops) because nobody else wanted to do that bullshit at first.
So when criminals were loaded up in a carriage, the wagons were called 'paddy wagons' due to cops mostly being Irishmen and back in Britain paddy was a slur for an Irishman.
I do apologize for my fellows for being pigs.
Maybe this is common knowledge? I'm not sure.
The American dream is to immigrate and endure centuries of slavery and exploitation, in the hopes that your people will be promoted to White.
That really is it, Mexicans right now are basically the same as the Irish and Italians.