They're "Jews Not Zionists" and quote Rabbi Yoel Teitelbaum in 1958 speaking out against Zionist heresy:
"....if we place all the immodesty and promiscuity of the generation and the many sins of the world on one side of the scale, and the Zionist state on the other side of the scale by itself, it would outweigh them all. Zionism is the greatest form of spiritual impurity in the entire world. (It's) polluting the entire world. (It's) polluted the Jewish people with (its) heresy....Everything our blessed rabbis cried out about earlier in the century about the dangers of Zionism (have) been forgotten....It is impossible to describe to what extent the world has become sunken in such a falsehood which is destroying the entire Torah."
Jews Not Zionists believe that Zionism is heresy, and "the existence of the so-called 'State of Israel' is illegitimate." Zionism violated Torah doctrine, the very essence of Judaism. It believes that human life is sacred and human rights aren't to be denied by those who would sacrifice them for national security or any other reason.
"Judaism and Zionism are by no means the same. Indeed they are incompatible and irreconcilable." Good Jews can't be Zionists, and Zionists can't be good Jews. According to Jewish tradition, seven universal Noacide morality laws apply to everyone. Also the Ten Commandments for all monotheistic religions, and another 613 obligatory laws for traditional Jews.
They eschew violence, military power, and brute force. They're about morality and spiritual purity. Zionists made belief in the Torah and fulfillment of religious obligations a private matter, not a common obligation for all Jews. They made Judaic dogma subject to party or parliamentary votes and set their own ethical and moral standards, suiting them alone.
Many times in Jewish history, an extremist minority misled the majority. Worshiping the golden calf happened earlier. Today it's political Zionism. Before its emergence, piety, decency, learning, and belief in justice and mercy characterized most Jewish leaders. Now they're the minority. It's why they believe a good Jew can't be a Zionist, and a Zionist can't be a good Jew and aren't the legitimate spokespersons for anyone but themselves. From a religious point of view, they're heretics.
Jews Against Racist Zionism
They include distinguished figures who speak out for "anti-racist Jews and indeed all anti-racist humanitarians." They decry "anti-Arab anti-Semitic racist Zionists running Apartheid Israel and their Western backers." They're appalled by the continuing Palestinian, Iraqi, and Afghan genocides that have killed and dispossessed millions. They see Zionism as a threat to all Jews and humanity unless something is done to stop it.