This isn't about the Irish. It never is, this is about foreigners. There are a lot of these people in this country, our racist anti-immigration folks are probably larger per percentage of population than the US. This person is talking about immigrants. Not Irish people, they're saying "Irish" here because they know if they say "brown people" they'll be shouted down for saying the quiet part out loud. So they dip into old school anti-Irish racism as a smokescreen. Surprised they didn't use Italians tbh, probably couldn't find an article to back up their racism with "science."