Hamas's on Oct 7th aimed to kill civilians. Not only did they aim to kill them they aimed to rape, torture and mutilate them. Oh and kidnap some of them.

https://apnews.com/article/israel-palestinians-un-rape-oct7-...

You assertion is also ridiculous because it ignores the order in which things happened. First Hamas attacked civilians. Then Israel responded. During that response civilians were killed.

Israel's killing of civilians is a war crime only under certain conditions. Killing of civilians during war isn't automatically a war crime. If there are war crimes, then we should certainly condemn them.