Presently, they are (at the incitement of their Imams) revolting against continued Israeli administration of the West Bank areas not under the administration of the PLO, at least that's my impression. (Well, many seek the total destruction of Israel, but those are just plain wrong and may be treated however Israel sees fit).
Is this revolt just?
No, I don't believe it is. Since the PLO is not a just Government, Israel has no duty whatsoever to respect the "independence" movement of the Palestinian insurrectionists, any more than the Czar should have respected the insurrection of the Communists. Those who advocate Israeli withdrawal and PLO rule seek to bring their fellow-citizens under a worse tyranny; Israel has no obligation to grant them their aims.
In fact, Israel would be justified in liquidating the PLO administration as a bad experiment that didn't work out, and see if the Palestinians will either come to terms with Israeli administration, or bring forward more worthy independence representatives.