I almost had a crazy theory about what determines if a group can overcome their oppression and become mainstream, but the Irish provided a counterexample that shot it down.
The theory was that to overcome oppression, a group had to contribute a cuisine or food style that became mainstream. Asians. Check. Jews. Check. Italians. Check. Hispanics. Check. Blacks...they contributed soul food, but it has not gone mainstream the way the others have, and they have not overcome oppression. Indians. Check.
But I don't think I've ever even seen an Irish restaurant in the US, so my beautiful theory went down in flames.