"Hamas confirmed that Jalamneh was one of its members. The Jenin Brigade, which includes a number of Palestinian armed resistance groups, said two of the three men were members of Islamic Jihad."
You could look at this different ways. These members of resistance groups or terrorist organisations, depending on your perspective were as the IDF have said all along hiding within hospitals and by civilians.
However, I assume if war if terrorists or enemy combatants hide in hospitals then you are not allowed to engage. Probably not armed, they should have taken them captive.
It feels like it's OK for 'resistance fighters' as some would label them, to kill but IDF not. I think there are many wrongs in this conflict and its not black and white. The children are suffering on both 'sides'. There are no winners on this conflict. Killing is awful. Too many have died.
If everyone put down their weapons and negotiations could take place. Sadly that won't happen.