Not to support Israel

Rabbi Chaim Soloveitchik,
Rabbi of Brisk, Poland (1853-1918) - the founder of the "yeshiva approach to Talmudic study"

If you intend to give a coin to the Jewish National Fund, give it to another idolatry, but not to the Zionists, since this idolatry is worse than any other.

Rabbi Yisroel Meir Hakohein,
Author of Chofetz Chaim (1839-1933)

Better a third of Torah learning should stop, rather than join them { the Zionists}.