In my comment I tried to specifically point out that it was more demeaning than actual racism with some of the statements which are two very different forms of offense.
You mention the whole "PC" thing which is a good area for discussion on this article. Americans (myself included) have this SJW culture around being politically correct and I think it's leading society more towards inherent racism. My old college friends came from all over the world, and we would always joke about the stereotypes of everyone's background. They'd call me 'Murica and I understood where they were coming from, as did they when we had names for each other. Nowadays it's common that someone would be offended if we joked in the same manner, and we're missing the ability to break the ice between our cultures/ethnicities and be friends without perceiving it as prejudice.