Says international law. https://casebook.icrc.org/a_to_z/glossary/proportionality#:~:text=The%20principle%20of%20proportionality%20prohibits,and%20direct%20military%20advantage%20anticipated%E2%80%9D.
Hamas wants to make a deal if they can get what they want out of it. That's the whole reason they took hostages. Terrorists who take hostages shouldn't get what they want.
First of all, he's not my president. I'm not Israeli.
Second, comments made by certain people in the immediate aftermath of a traumatic terror attack aren't proof of genocidal intent. He has clarified his position since then.
Also, have you ever wondered why South Africa of all countries brought the case to the ICJ? Do you think it has anything to do with the fact that they entertained Hamas leaders as visiting dignitaries a month before they submitted the case?