Over half of the population of Jordan are Palestinians. Over half.
Israel started a civil war in Lebanon in the 1980s because it had Palestinian refugees. That's it, just started bombing away. The brightest spot in the Middle East, blasted. Beirut literally took the crown from the Bronx as the worst place on Earth back then because of the destruction courtesy of Israel.
The IDF started doing the same there again in the last couple of years.