The Nazis had no problem allying with the Arabs including the Palestinians in WW2, so there is evidence these weren't placed in the same racial category as Jews

The Nazis had no problem allying with the Arabs including the Palestinians in WW2, so there is evidence these weren't placed in the same racial category as Jews. As these racial categories are all pseudo-science anyway, their only meaning is the meaning attributed to them by the racists. So you can only complain to 19th century Europeans for not being as racist towards Arabs