this might just spark a war with Israel and it would be one that wouldn't have western backing. You know the palestinians are going to use force to open the settlements to all and you know Israel is going to invade(probably with the intent to annex I don't they have ever been in a war where their wasn't some attempt to get land out of it) to "protect" the settlers their despite it is in fact illegal for them to be there. This might provide the spark needed to start of the chain of events that will get peace between Israel and those it opresses.
I think the Palestinians want the world to recognise their pain and so this time around they will not force anything. Just listen to the reports coming out of Bilin. Inspite of the kidnapping of Mohammed Khatib the leader of the nonviolent resistance movement by Israelis, they are sticking to their determination to keep the movement going.
http://palsolidarity.org/2009/08/7982