Actually, they need to negotiate with Palestine. Of course, first they need acknowledge that there is a Palestine. The old two state solution often proposed but never accepted by Israel.
It used to be Palestine. Before WWII there was a Palestine. But their side lost and they were given to England as a protectorate. A bunch of jewish terrorists decided that they would create a Jewish state and annoyed England enough that england finally said ok. So the jews kicked the Palestinians out of their homes and put them on a couple of reservations. The gaza strip and the west bank. The last time that negotiation broke down the issue was reparations. Sort of pay us for what you took and and call Palestine a state.
But the last time that there was negotiation going on kushner never even met with anyone from Palestine. He just talked to israel. Both sides have to negotiate in good faith. Israel never does that.