The Saudi plan is a scam and EVERYONE knows it. The Usraelis can never pull back to the 1967 borders, they have already incorporated too much of the land into Israel. Israeli settlers populate many points and defend these compounds tenaciously. The Israeli government would never move against these settlers and, in fact, rely on them for political support.
Suggesting that Isael revert to the 1967 borders is like Fox of Mexico telling us the the immigration/amnesty issue would be square if we reverted to the 1840 borders. Texas and California long ago ceased being part of Mexico and became part of the US just as points (not all) of the lands acquired in 1967 have become part of Israel.
good analogy.