Maybe you hadn't thought about it that way before is because you put yourself in a bubble where anybody who disagrees with you is actively engaged in genocide.
I really hope you get yourself out of whatever you are going through. You probably could be a good ally if you work past this emotional shit.
Which specific real world protestors are acting as unhinged as this person was? From what I have seen, this behavior is exclusively among online communists, not actual pro-palestine protestors.