OK, assuming that civil war doesn't break out, which is not at all a sure thing, the Gaza pull out would end up relocating maybe around 6 thousand people. Note the word relocating. They get moved from one occupied territory to another.
I don't think there is a single court in the world, including Israeli, that sees the territories as a legitimate part of Israel. The occupation of Gaza is unsustainable, the settlers are a vast minority and generally the place is more trouble than its worth. So, abandon Gaza (though not completely, I hear Israel plans on retaining control of the buffer zone with Egypt), and instead move everyone over to the West Bank, where they are used as a sort of demographic weapon to legitimize the occupation by trying to build a significant presence of Israelis.
The bad behaviour (settling on land that does not belong to you) does not in fact go away, it just moves a few kilometers to the west. How is this a major concession? In fact, in the long term it could very well prove to be a setback for the Palestinians, since already the wall has carved out something like an additional 20% of the West Bank.
Think of it this way: back in the days of the Britsh Empire, if Britain decided to move its settlers from occupied Hong Kong to occupied India, would that be a great and generous act on their part?
Until I see some legitimate authority rule that the territories legally belong to Israel, and provide a good reason why, I'm going to continue to see it as a foreign occupation which is illegally trying to annex another's land.
I think thats the jist of it Sandwich, you think that Gaza and the West Bank belong to Israel for whatever reason (God, military conquest, whatever) and I don't.