I guess ol’ Patsy never saw “The Gangs of New York”.
You're talking about another time in our history where we allowed to much immigration, too fast, by 3rd world uneducated criminal type aliens. We were smart enough to put a stop to it. Can't say we are that wise now. The point Buchanan was trying to make and missed by most readers and him, is that the USA (USCIS) is not vetting new immigrants. They gave legalization to thousands with no review, they couldn't even find the files. Blanket amnesties, like the one given the Koreans with no vetting gets us undesireables, no matter what country they come from.