Wouldn't have changed anything.
The objective of the Palestinian leadership, many Arabs in that part of the world, and far too many Westerners, is the extinction of Israel.
Where the borders were, either pre-1967, the original borders, or all of "Judea-Samaria," would not make one bit of difference.
The idea that you can strike some kind of deal with someone who wants you dead, dead, dead, is part of the problem we're having with the war on terrorism, too.