"Assimilation has forever been one of the enemies of the Jewish people."
He added that he "has nothing against Mr DiCaprio, who I have no doubt is a talented actor.
"Come to your senses, look forward and back too — and not only the present. Don't marry Leonardo DiCaprio, don't harm the future generations."
Lehava’s Facebook page claims one of its roles is to provide “assistance” to Jewish girls who are in relationships with non-Jews.
Mr Marzel has a record of violence in Israel, including assaults on a Palestinian, an Israeli police officer and Israeli left-wing journalist Uri Avnery. He has also declared a “holy war” against homosexuals in Israel..
