If they are harassing people or shutting down schools than they should be removed but people do have the right to protest even if they are stupid.
That is true, but universities and many other organizations are subject to anti-discrimination laws. A university which allows anti-Jewish protestors is in violation of those laws.
Notice that the same universities which will tolerate and even support a multiple day protest supporting Hamas, and justifying their attack on innocent Jews would never tolerate for one hour a protest by some group which was, for example, against another minority and had previously engaged in violence against the same group.
They won't even allow a mainstream conservative to speak on campus in many cases, let alone any group which says the kinds of things the pro-Hamas protestors say aimed at other groups.