Millions of whom? People that live in the regions that would presumably go to Palestine? Because the sharia law is the law they want to follow instead of a modernized constitution with equal rights for everyone? Sure, lad.
And if you answer with “well, there would be peace if the deal is to go through”, - no, there would be no peace. There would be more war, if anything. Palestine shoots rockets at Israel from Gaza whenever it gets the chance to and it would continue to do so no matter what because that’s what Palestine is about: shooting rockets at Israel.
Very few people in the region still want to be a part of Palestine and most arabs just live peacefully in harmony with jews.
And imagine what would happen to the jewish majority living in those regions. Millions would have to move or be left in a horrific place. Ever wonder why Gaza has barely any jews left?