Beware of looking into the abyss for justifications of anything, for it will look back into you.
This is far more complex than the polemics and proxy atrocities, especially with the amount of third party involvement with their own agendas.
The Palestinians are not and have never been a politically "respected" culture or tribe in the overall Sunni world; they've just been useful pawns, territorial latecomers; before they were Syrian or Jordanian - or Beduins. As for respect for the various Jewish groups settled in the Levant; they, too, are not politically considered a respected part of the Abrahamaic cultures in general.
For all the calls for brotherhood in all three Abrahamaic cultures, once questions of power or wealth get involved, it all goes out the window, even within the greater groups.
That region has been caught up in cycles of brutalizers and victims on all sides since the Ottoman Empire fell. Every attempt at a peaceful situation has fallen through outside or extremist religious influences, which makes it harder each time to come together.
How does one cut through generations of shared pain and hatred - based solely on extremes in religion?
Haele