Yeah, even if those 3 were Hamas combatants - that would have been a textbook war crime to shoot someone unarmed and surrendering. Instead they’ve shot 3 of the hostages.
The IDF has got a serious problem with restraint and so many Israelis or pro-Israelis have a serious problem with viewing Palestinian civilians as human.
If you’ve looked at any of the IDF footage of the combat, you will see lots of GoPro videos of IDF soldiers seeming very jumpy and very quick to pull the trigger, a lot of soldiers aren’t following the rules of engagement and are firing first and worrying about what they’ve shot after the fact. So I’m not really surprised by this.