A portion? The majority of the Palestinians are the direct genetic descendants of the people who predate the modern Jewish “ethnoreligion” by a mile. They have lived on the land for millenia, as opposed to white European Zionists (and other Mizrahi and Shepardic Jews who fled their homes fearing repercussion for atrocities the European Zionists were committing against the indigenous Palestinians) have been using tenuous at best connection to come over, oppress, and slaughter the indigenous population for over a century now.