I remember when during the 2020 civil rights protests in the US people were talking about the Geneva convention and calling what the police did "in violation" of it, especially wrt chemical warfare, only to be surprised to find out it doesn't apply outside formal wars.

I think if we want to make comparisons, an important difference is that Gaza has been existing in a limbo where Israel insists it's a sovereign territory because Israel withdrew from it but also insists it's part of Israel because they want to control its borders and what goes in and comes out of it.

Also, in addition to everything that happens in Gaza, Palestinian Israelis and Palestinians in the West Bank have also been targeted by Israel despite Hamas being largely confined to Gaza.