I went to a pretty mixed high school and a lot of people there decided it was okay to be racist to white people. I asked my Portuguese friend why he didn't have a problem with it, and he said because he's not white. Same with my Polish friend. Same with my Portuguese teacher.

Apparently you can earn all the benefits of white privilege while not self-identifying as white, and as long as you aren't calling yourself "Irish", people are okay with that.