A bit uncommon before Black September, and there was never another after that. The events of Black September put a glass ceiling on the careers of Palestinian-born or Palestinian-origin Jordanians in both the civil service and the military. They still remain captains of industry and commerce (Talal Abu Ghazaleh and the Arab Bank, two of the biggest corporations in Jordan, were founded and headed by Palestinian-borns), but there is still something of a Jordanian-Palestinian divide even now.
https://www.lonelyplanet.com/jordan...-rivalry/40625c8c-8a11-5710-a052-1479d2757adc
It is not Black September but the change took place long after this POD in 1988, long after this POD is over when Jordan gave up on holding the West Bank. What happened there was a real stab in the back for these Palestinians.
https://www.omicsonline.org/open-ac...nian-passport-2332-0761.1000113.php?aid=23346
"What constitutes Jordanian citizenship has shifted dramatically since Jordan’s 1988 disengagement from the West Bank. Prior to 1988 all Palestinian refugees entering Jordan, with the exception of 1967 refugees from Gaza, were granted full Jordanian citizenship. This designation entitled them to the rights and responsibilities enjoyed by all Jordanians. However, this practice has since changed and thousands of Palestinian-Jordanians have been rendered stateless–losing all civil and political rights virtually overnight."
In this POD, there would be no such problem.
On the other side of the partition, what does Palestine look like? Will there be attempts by this version of Israel to move their Arab population to Palestine, and if so, would Palestine welcome them, or would they in fact reject them, in favor of trying to support civil rights for the Palestinians in this Israel?
Interestingly after 1967, when these Palestinians inside of Israel met Palestinians who were in the occupied territories, the ones in the occupied territories called them Israelis and refused to accept them for quite a while. If we imagine that they were forcefully moved then the Palestinians outside, I am sure would have accepted them.