The US has never turned its back on the Israeli/Palestinian conflict. Not even during the Bush administration. The US has always supported the Israeli side of the conflict with weapons and with many billions of dollars of US taxpayer money. If the US were to well and truly ignore the conflict, it might actually have a chance of coming to some kind of resolution.

It's simply not possible for the US to arm Israel to the teeth and prop up its economy with US taxpayer dollars and expect US emissaries to be able to broker a solution.