How long would you agree would be temporary? As long as there is going to be an Israeli presence (especially a military one) there will be an anti-Israeli sentiment (though that's not going to be hard to encourage), which will just be fuel for more terrorist attacks. Israel then will just use this as justification to keep their military within the West Bank to protect their interest. Basically just keeping us right were we are today. Personally, and maybe I'm being pessimistic, I don't see Israel ever giving up the West Bank, as it is too big of an interest to Israel. Israel will eventually have to deal with the idea of giving the Palestinians who live within the West Bank an Israeli citizenship, which results in a whole new set of problems.