ISRAEL — An Israeli Christian leader and a prominent American Jewish pundit on Monday night pushed back on efforts on the political right, especially in the United States, to defame Israel and dismantle Judeo-Christian unity, exposing what they described as the malign motivations of some of the world’s most watched online personalities. In a sit-down discussion at David’s Harp Hotel in northern Israel, Shadi Khalloul and Josh Hammer castigated the notion that Israel oppresses and marginalizes Christians, an assertion popularized by far-right podcast hosts Tucker Carlson and Candace Owens. Khalloul, founder of the Israeli Christian Aramaic Association and a former...