One thing I am certain about - wars rarely settle things, often resulting in long-term distrust and hatred.
In the Middle East this is true at the moment. For many years Israel has had people opposed to the very state of Israel. At the same time Israel has opposed the existence of the people of Palestine. There is much bitterness.
Surely, the only long-term solution, no matter the past history, is peaceful co-existence. Everyone on the planet has a right to peace.