A Facebook campaign ad from an upstate New York county’s Republican Party has been slammed as anti-Semitic and “deeply disturbing.” Titled “A storm is brewing in Rockland,” the video takes aim at the large and growing hasidic Jewish community in the county, the specter of “overdevelopment” and a proposed yeshiva campus. The video, which appeared to have been removed on Thursday morning, features menacing music, the slogan “If They Win, We Lose” and a warning that “they” will “change our way of life.” “Aron Wieder and his Ramapo bloc are plotting a takeover,” the video intones, referring to a Hasidic...