This incident shows that even the "brothers" of the Pallies don't want to hear from them. The Pallies are the outcasts of the Arab world. Were there no Israel, Palestine would likely be occupied by Syria and/or Egypt, with the occupation being far more brutal than the relatively benign (when there is no terrorism) Israeli presence.
You got that right. Kuwait, Jordan and Saudi have cast them out at various times for their treachery. Attempts to overthrow governments (Jordan) and allying themselves with Iraqi invaders (Kuwait)