An attacker randomly slapped a Jewish man on a Brooklyn street in an assault that authorities are investigating as a hate crime, new footage released by cops shows. The 22-year-old victim was walking on Avenue L near East 32nd Street in East Midwood around 11:30 p.m. Friday when a man got out of the passenger side of a light-colored minivan and approached him, authorities said. The video clip released late Sunday shows the suspect standing next to the victim – at one point appearing to get into a fighting stance – before striking him in the face a second later,...