Because Children are getting killed.
Now I'm not going to go all rabid and say serves the children right. It doesn't. But I'm also not going to put the blame on Israel on this one either.
In WW2 the allies killed over 2m German civilians. I'm pretty sure that there were hundreds of thousands of children killed.
People talk about de-escalation and the end to hostilities. Well we de-escalated world wars and ended world wide hostilities. If Hamas truly cared about their "children" they would have sent them south into Egypt as soon as the attacks started.
Instead they had celebrations on the street at Israeli children dead.
This is going to be brutal and children are going to die. I just hope, fervently, that as few children as possible are in the line of fire. In the hope that if Hamas is gone and peace reigns for long enough, that new children will get a chance to grow up in peace and prosperity.