I got called a racist to Asian people once because I said that people from certain Asian countries have a white skin tone. Little hard, though. I'm 25% Japanese.
The way it works is, you're allowed to make jokes like that, as long as you are that. Take me for example, Hispanic male, lives in the borderlands, pretty much lives in a slice of Mexico here in the US, I can make Mexican jokes, I'm second generation American but I'm very familiar with my bloodlines culture. Other races or beliefs I will not joke about on here, I don't even make fun of my own belief