No, they are responsible for what they did and Israel is responsible for what they did. What Hamas did was in a context that you’re ignoring. If you’re taken prisoner by someone and trapped in their basement, do you think it’s reasonable to kill them to get out? Sometimes extreme actions are done in a context that makes them more reasonable, and ignoring that context removes any reasonable discussion that can be had. Hamas fought back against an oppressor with a lot more power. It’s not my place to say what actions they are allowed to take.

You’re trying to remove any culpability from Israel though by just saying “the war is on Hamas”, which isn’t true nor is it an excuse.