Sephardi Jews other, based upon such features as physical traits and culture. In some instances, Sephardi Jews have joined Ashkenazi communities, and have intermarried. Sephardic Jews are genetically related closely to their Ashkenazi Jewish counterparts as both diverged from the same cluster of ancient Iraqi and Iranian Jews approximately 2,500 years ago. Due to their origin in the Mediterranean basin, there is a higher incidence of certain hereditary diseases and inherited disorders in Sephardi Jews. However, there are no specifically Sephardic genetic diseases, since the diseases in this group are not common to Sephardic Jews in general, but are instead common in
Haredim and Zionism Sephardi or Mizrahi rabbis is far lower than among Ashkenazi rabbis, and these constitute a small minority of the Sephardi Haredi leadership. The Sephardi Haredi political party in the Knesset is Shas, which represents the vast majority of Sephardi Haredim, and is headed by Aryeh Deri. In 2010, Shas joined the World Zionist Organization, and officially became the first Zionist Haredi party. The party's long-time spiritual leader, Rabbi Ovadia Yosef, opposed saying Hallel in the Yom HaAtzmaut prayer service, but writes that, "One may say Hallel after the completion of the prayers, without the blessing..." While in the past, when