you are looking it differently, I disagree, I am one of those who supported Palestine.
Reason we are silent, because our governments already did what's needed from our side: heavily sanctioned the Iran, if I go and protest, what do I ask? To sanction Iran? They would laugh at me. Obviously, I am not going to protest and ask our government to go to war with Iran, which kills even more people.
Why is it different for Israel? Because our government supported it, we didn't sanction them, that was what we were asking for, while brutality was even higher than Iranian regime.
Not trying to downplay casualties, but just looking at relative numbers and methods, I don't see Iran bombing own people or killing 10% of its own population