Naked, ignorant racism. It does seem to be the case that no Arab has won the Fields Medal (which I think is what he means when he says Fields Prize) but the other claims are false, which he would have realized if he'd done even a cursory google search.
RFK: "There's five hundred million Arabs in the world. And yet they don't produce science. They don't win the Nobel Prize. They don't win the Fields Prize. They don't win the Wolf Prize. They don't produce literature."