An arab person could pass as white and so could a hispanic person or a mixed race person or any other kind of asian person or even a black person or an indigenous person. Race is a made up concept and as long as someone LOOKS white they could be considered white at a glance even if they have no european ancestory. And also theres a lot of european people who can be considered not white who have existed as a group before europe was even a thing. Then theres the europeans who are white by modern standards but back in the day would not be considered white. Look all of this is stupid, we should move people around like they did in half life 2 and make the world a nice brown tinge color so that racism could be ended.