Hopefully you have watched this @Mrsmulhern . Many ask, then don't actually read or watch what others show and share.
The video in French above of the people at the festival hiding scared, whilst terrorists, and ordinary Palestinian men ran around killing people, ends with pictures showing which of those hiding in terror, in the short clip were either assinated or taken hostage.
Hamas want to wipe out all Jewish people and Israel doesn't want that to happen and in its grief the government declared war on Hamas. Many thousands of innocent people have been killed. It's sickening to watch. People of both Gaza and Israel dying.
I get your hoping for simplicity. If only as simple as you say, however, terrorists don't think like you do. They don't want to sit down, divide land and stick to their area, they have sworn to wipe out Israel and its people. Israel and the US and also Germany are showing support for Israel and won't allow it.
We all wish it was simplistic and if the entire world had that innocent childlike thinking it could be achieved. However, terrorists, fascists, dictatorships, evil individuals, etc sadly, don't think in childlike ways, they are evil and not fighting back against them, means being slaughtered.
Somewhere in the middle, negotiations will hopefully stop this awful war as quickly as possible. Sadly, there are other conflicts and terrorism going on in many countries, have a look, fortunately this one isn't being ignored as many are, for many reasons other than just killing people is bad. Maybe, some will wake up to all the killing in other countries and speak up about those too, otherwise, why not?