Gilad Kariv is poised to make history this month as the first Reform rabbi to win a seat in Israel's parliament. He first encountered Reform Judaism during a high school trip to the United States. He’s at the lectern, wearing a kippah as an Israeli," said Rabbi Rick Jacobs, head of the Reform movement in the U.S. who has lobbied the Knesset with Kariv, his Israeli counterpart, for nine years. They see Reform Judaism as a threat unlike secularism, said one expert. “Reform Judaism conveys an alternative interpretation of Judaism," said Shmuel Rosner, senior fellow at the Jewish People Policy Institute in Jerusalem.