A couple weeks ago, I was present for a "German, Jew and a Chinese man" joke. As a newly minted Jew, it was very odd and uncomfortable. I sat quietly with a knot in my stomach. Ultimately, the joke was more offensive to Chinese. The joke teller didn't know I was Jewish so I made a point to tell him.
My brother believes I overreacted. I thought I did fine and wound up having a nice chat about Judaism. I'm not the kind of person who can sit quietly when offensive stereotypes are discussed. I even have trouble making fun of outsiders/weirdos. Because I have been an outsider/weirdo.