Why are there still 'Palestinian refugees'?

It's been seven decades since the 1948 Arab-Israeli, and yet there are
still an estimated 4 million Palestinian refugees...and zero Jewish
refugees. With so many nearby Arab allies of the Palestinians, how did
this happen? What does it say about Israel? What does it say about its
Arab neighbors? Dumisani Washington, Diversity Outreach Coordinator for
Christians United for Israel, explains.