Nobody is saying that 100% of the Palestinians would then make peace by doing that. But doing so would rob Hamas of all its popularity. Palestinians turned to it because they had no other choice; Abbas was doing nothing to stop the slaughter of Palestinians and asking the world for help got nowhere. Conversely, if all attacks by Palestinians stopped for good then most of the Israeli rightwing would be abandoned by the Israeli public. These two groups are not as different as you think.