I think it is absolutely grotesque and distasteful to hold pro rallies for Palestine and Hamas right now, but I would not stop them. They should be free to protest and speak.
I am not saying that every protestor there was pro hamas. There is video. It did happen and the group wasn't 3 people. I am providing recently information to the OP to directly answer their point.
I do not know if anyone is protesting the civilian deaths due to retaliation but that would be a worthwhile reason to hold a candlelight vigil or demonstrative march in support of the inevitable bystander victims and their families here.
If we were spiritually sound we would be holding mass gatherings in remembrance of all victims and in support of all innocent survivors. But that does not draw enough attention for us to have heard about one if it took place.
That is a good point, and that is probably the one time I would say that they should not be allowed. Openly threatening people, even a broad group, with violence is absolutely wrong. I could see that being the case where I would say no, those protests need to stop.