It's frustrating to hear a bunch of white men who normally stick around groups of other white men talk about how someone who is very different - black, female, Jewish - is silly for feeling threat in situations where white men don't feel threat.
When people of your racial/religious group are murdered and attacked and harassed (and anti-Semitism is still a thing) her perception of threat is no doubt heightened.
It's unreasonable to expect her to confront people making dumb jokes if she feels threatened by them.
(However, her actions are not acceptable. She could have sought out conference organisers and told them.)
