A group of 10 black youths — one of them a 12-year-old girl — surrounded a white couple's car in Brooklyn, viciously beating the husband and yanking the wife to the pavement by her hair as they peppered the two with racial slurs, authorities said. “Get those crackers!” some of them screamed, according to court papers. “Get that white whore!” The confrontation erupted about 7 p.m. Monday, as the marauding group crossed Avenue U at E. 58th St. near Kings Plaza Shopping Center in Mill Basin. Ronald Russo, 30, and his wife, Alanna, apparently had the green light and the...