The Palestinians were told by the Arab countries - Lebanon, Egypt, Syria , Jordan and Iraq- that they should seek temporary shelter and leave their homes. Many did, and it turned out that the armies of these countries were incompetent, and when they were defeated, the Israelis refused to allow then to return to their homes. Other Palestinians were driven out of a number of villages by the Israelis. They do not oppose Jews because they are anti semitic, they only want their land back.
I someone were to drive you out of your home, you also would want to return after a war.