I believe their original home was Jordan, but the people of Jordan despise Palestinians, The were in Lebanon and the Lebanese couldn’t get rid of them fast enough. They are an unwanted people. Perhaps they need to do a self analysis and face their problems - changing their way.
No; they’re not from Jordan. They’re from different places but mostly Iraq and Egypt IIRC. Even Zuheir Mohsen mentioned Jordan as a different entity from “Palestine”, to be annexed once they had conquered Israel; “Arab unity” (the pan-Arab Caliphate) was all that mattered to the PLO.
Not to mention, Mohsen in the same breath referred to Israel as “all of Palestine” when referring to Jordan as next to be taken over by them.