Note: I dislike settlements in the West Bank. I think it makes the problem needlessly more intractable than it already is. I especially dislike the nigh-terroristic behavior of a portion of the settlers and the seeming inability or unwillingness of the state to properly apply rule of law against them.

Nonetheless. Legally speaking, if a deal isn't signed by both sides, then it's a worthless piece of paper. Settlements in the West Bank are only possible because the Palestinian side refuses to ever say "these are the borders of our state, that which is outside these borders is Israel". There's no sense in talking about "deals" that never happened, or were immediately violated by e.g. 1973 invasion, as though they have a bearing on current reality.

My entire point when I first commented is that there have multiple opportunities for proper long-term peace and Palestinian statehood that were either rejected or violated in short order by the Palestinians and/or their allies.