Two states along the 1967 borders. If Israel and the US agreed to this, the international community would overwhelmingly support it. This would be more than enough to guarantee Israel's security.
We’re looking for ideas that end in less violence and where the leaders involved aren’t assassinated.
By who? Your phrasing suggests it was a part of Hamas' terrorism campaign.
Central to the conflict is the Israeli refusal to accept responsibility for the current state of affairs, or to recognize any conception of proportionality. "We f*cked up, and we have not treated Palestinian life as equal to Israeli life," would go a long way towards reconciliation, but Israel will never admit wrongdoing even in the face of actually having committed wrongdoing.
When arabs conquered on colonized those lands they were anything but peaceful. For that islamic era to occure, hundreds of thousands had to die.