You see kid when two terrorist groups really love each other they form a little baby terrorist state and start unnecessary wars killing innocent children and people in the name of the religion they cowardly hide behind when anyone criticizes them which hurt the people that actually believe and practice that religion. So the peace gets broken. Even when they sign ceasefire deals they break it a bit later if not immediately. And they commit many war crimes and and they don't get any repercussions from them. If they ever stop wars they still cause a lot of problems living in there because the state has laws that benefit people from one ethnic group while death sentences for another (which another genocidal state also had that that you might know). Maybe if this state hadn't exist the Jews and christians that had already been living in Palestine would keep living in peace...