Complex sentence: The Sephardi-Orthodox party Shas rejected association with the Zionist movement, however in 2010 it joined the World Zionist Organization, its voters also generally regard themselves as Zionist and Knesset members frequently pursue what others might consider a Zionist agenda.
Split into simpler sentences: The Sephardi-Orthodox party Shas rejected association with the Zionist movement; however, in 2010 it joined the World Zionist Organization. Its voters generally identify as Zionist, and Knesset members frequently pursue what others might consider a Zionist agenda.