Polish and Russian Jews are totally different in appearance than those with ancestry in the Arab world. Arabs also differ and many Lebanese, Jordanian and Palestinians are generally much fairer than those from the gulf and Saudi. I was always told this was because of the influence of the crusaders, mixing up the gene pool. Why should the Jews be any different?
High school teacher's union threatens strike (Haaretz)
from the article: DNA links prove Jews are a 'race,' says genetics expert