Off White Comic Of Wolves Maybe Off Topic, But Posting This Here Out Of Curiosity?

Maybe off topic, but posting this here out of curiosity? - off white comic of wolves

Why is good to laugh at ethnic jokes?
If this done by someone of the same ethnic group, but not from a different ethnic origin.

Case, the program Last Comic Standing, a white man became a routine in which he played a Japanese fighter pilot. He was released by judges as "PC. Was in the same episode, a Korean girl routine, almost all ethnic groups from Asia and Mexico, who said, basically, the same judge ruled that even if they make fun of his own people . I think we are racist if we laugh at the jokes of The White Guy, but if we do not laugh, Koreans, despite all the jokes were based on ethnicity. What do you think?