Shas Yosef received strategic help and guidance from Rabbi Elazar Shach, leader of Israel's non-Hasidic Haredi Ashkenazi Jews. Yosef founded the party in 1984 on the platform of a return to religion, and as a counter to an establishment dominated by Ashkenazi Jews of European extraction. Not all Shas voters are themselves ultra-Orthodox. Many of its voters are Modern Orthodox and traditional Mizrahi and Sephardi Jews, due to its alignment with the promotion of an "authentic Middle Eastern" Israeli culture, which fits with traditional Zionist beliefs of a revival of authentic, non-Europeanized Jewish culture. However, it still represents the Sephardi and
Ashkenazi Hebrew from Spain in 1492 (or before) the Sephardic pronunciation of the vowels became standard in all these countries, ironing out any differences that previously existed. This makes it harder to adjudicate between the different theories on the relationship between today's pronunciation systems and those of ancient times. Leopold Zunz believed that the Ashkenazi pronunciation was derived from that of Palestine in Geonic times (7th–11th centuries CE), while the Sephardi pronunciation was derived from that of Babylonia. This theory was supported by the fact that, in some respects, Ashkenazi Hebrew resembles the western dialect of Syriac while Sephardi Hebrew resembles the