The rabbi, Rav Leor, said most rabbinic authorities "of the past and the present accepted the opinion that the lives of non-Jews don't' enjoy the same sanctity as the lives of Jews."
"Hashmadat goyem" (the extermination of non-Jews), he said was an established principle in Jewish theology.
The rabbi is affiliated with the messianic Jewish movement known as Gush Emunim which is represented in the Israeli Knesset by seven Knesset members.
The movement is represented in the Israeli government by Minister without portfolio Ed Eifam of the National Religious Party (NRP).
In 1994, Rav Leor supported the mass murder of scores of Arab worshipers by a fellow Jewish settler, Baruch Goldstein, an American Jewish immigrant from New York.
He referred to Goldstein as "a great rabbi and saint."