Well, there is already a UNSC resolution to resolve these conflicts. UNSC 242.

Just that Israel refuses to implement and US refuses to put pressure on Israel to implement them. Take away the US unconditional support for Israel, you will have a more conducive environment for negotiations.

As to Hamas, cut off the funding from Qatar. Funding had always come through Qatar (via Swift) with Israel's blessing - cut that off, the organization will just fade away. And you have to stop Israel from funding it and allowing funds to flow to them.

Netanyahu: Money to Hamas part of strategy to keep Palestinians divided

The prime minister also said that, “whoever is against a Palestinian state should be for” transferring the funds to Gaza, because maintaining a separation between the PA in the West Bank and Hamas in Gaza helps prevent the establishment of a Palestinian state.

Yes, Hamas was ONLY a Tool the Israeli Gov had used to split the Palestinian apart so there would NOT be a 2 State solution.

And the "root cause" of these wars, was always this - refer to video below.