The Left's version of "free speech" is "Your speech is violence. Our violence is speech."
On top of that, the pro-Hamas protestors and their university hosts are taking actions that are clearly in violation of laws prohibiting discrimination based on religion by publicly funded universities.
Those universities pretend that "free speech" applies to pro-Hamas protestors threatening Jewish students, but somehow they would never allow the same kind of speech directed at other groups. That's discrimination against the Jewish students.