Seems like the whole conflict was created by English who promised both Jews and Palestinians the same land when they help them.
The English cannot blame the french invaders in 1066 for their land problems. At some point, a generation or so, imo, your problems are your own. You night not have created them but you can sure choose to solve them or not.
The people living in Gaza are not savages, they are capable of sophisticated governance. They choose not to exercise that faculty and instead voted and continue to approve of violence and never-ending revenge.