I saw the same thing, though I left at the very first comment, because I didn't want to see the potential ensuing shit show, but I imagined the person that was offended perhaps had dealt with antisemitism in the past or was insecure and therefor overly responsive to perceived attacks or put downs to Jewish people.

The world is getting chaotic and I think this is bleeding into people's world view and everyone feels under attack.

Although, I think it's not about the person necessarily just looking jewish, it's probably that the jewish looking guy is dirty and looks like a caricature of a disheveled older person.

I'm not offended by it, but I can see someone that has some type of pain or sensitivity around the issue feeling badly and overreacting.

I think it's fine to call these types of over reactions out, but I will say that reading the comments here, I think too many people feel that to combat some peoples feelings of oversensitivity that they must ridicule the other person. I think It's good enough to just call it out and say, "hey dude, I think maybe your being oversensitive" and leave it at that.