Linda Sarsour, 34, director of the Arab American Association of New York, was leaving the group's headquarters on Fifth Ave. in Bay Ridge at 12:20 p.m. when Brian Boshell, 45, allegedly threatened her, called her an "Arab b----" and insulted her in Arabic. Boshell, who is white, then allegedly chucked a trash can at her and a woman walking with her, Sarsour said.