"We view this violent act as a severe attack on the Torah, Jewish law, Israeli democracy and the sensitive fabric of life in the Jewish society," the statement said.
Tzohar President Rabbi Yaakov Ariel, one of Religious Zionism's most prominent leaders, added that "those assailants do not represent even a smidgen of the Judea and Samaria settlers and the Greater Israel people, and they lack basic Jewish morals."
Tzohar Chairman Rabbi Rafi Feuerstein spoke to Prof. Sternhell's wife, Ziva, and wished her husband a speedy recovery.
The rabbis' organization added that every rabbi, educator and Jewish leader has the moral duty to denounce physical or verbal violence of any kind, and explain the dangers of unfounded hatred to the Jews' existence in the Land of Israel.
Tzohar was founded following the 1995 murder of Prime Minister Yitzhak Rabin in a bid to mend the rift among the Jewish people.