Palestinian refugees have started civil wars in Jordan and Lebanon. Neither country is keen to repeat that experience and Egypt is not keen to join that list.

Palestinian refugees have started civil wars in Jordan and Lebanon. Neither country is keen to repeat that experience and Egypt is not keen to join that list. https://en.wikipedia.org/wiki/Black_September https://en.wikipedia.org/wiki/Black_September https://en.wikipedia.org/wiki/Lebanese_Civil_War https://en.wikipedia.org/wiki/Lebanese_Civil_War