Judaism
Around the 1st century CE, there were several small Jewish sects: the Pharisees, Sadducees, Zealots, Essenes, and Christians. After the destruction of the Second Temple in 70 CE, these sects vanished. Christianity survived, but by breaking with Judaism and becoming a separate religion; the Pharisees survived but in the form of Rabbinic Judaism (today, known simply as "Judaism"). The Sadducees rejected the divine inspiration of the Prophets and the Writings, relying only on the Torah as divinely inspired. Consequently, a number of other core tenets of the Pharisees' belief system (which became the basis for modern Judaism), were also dismissed by the Sadducees. (The Samaritans practiced a similar religion, which is traditionally considered separate from Judaism.)
Religious anti-Zionism
Today, the main Jewish theological opposition to Zionism stems from the Satmar Hasidim, which has more than 150,000 adherents worldwide. Even more strongly opposed to Zionism is the small Haredi Jewish organization known as Neturei Karta., which has less than 5,000 members, almost all of whom live in Israel and Palestine. According to "The Guardian", "[e]ven among Charedi, or ultra-Orthodox circles, the Neturei Karta are regarded as a wild fringe".)