Most Arab leaders in the region have no problems with making peace with Israel - it's actually only the terror organisations who refuse - Hamas, PLO, Iran, Huthis ...
And there is actually no confusion about the "Palestinians" in the Arab world - as Egypt annexed Gaza, they made it pretty clear that they will not allow an Arab state there and also that they will never accept Gazans as their equals. Same happened in Jordan after annexing the West Bank. No one really wants them in the region, because Palestinians are THE source of instability and they cost the Arab countries actually way too much. And basically the only reason why they support the Palestinian cause is the chance for political emancipation of the united Arab world from the western dominance.
That 'most' Arab leaders are happy to operate as clients of the US and are just as susceptible to race science nuttery as you are doesn't really mean much.
And there is actually no confusion about the "Palestinians" in the Arab world - as Egypt annexed Gaza, they made it pretty clear that they will not allow an Arab state there and also that they will never accept Gazans as their equals. Same happened in Jordan after annexing the West Bank. No one really wants them in the region, because Palestinians are THE source of instability and they cost the Arab countries actually way too much. And basically the only reason why they support the Palestinian cause is the chance for political emancipation of the united Arab world from the western dominance.