The problem with identity politics is that, by its nature, is exclusionary by ignoring those who are not identified.
Ignoring or dismissing some person or group is a "slight" (unspoken insult). "Slights" are the seeds of resentment.
He did include the Polacks and the Ruskies, but left out Micks, Guineas, and Puerto Ricans. J. Lo, Rosie Ruiz, and Erik Estrada fans will be most upset.
The good news for Puerto Ricans, they've finally achieved equity with the Anglos. They are American enough and white enough to no longer be considered an oppressed minority. Enjoy your new White Privilege, my freakin' Rican friends. I look forward to seeing you on St Patrick's Day.