As night fell in southern Brooklyn on Aug. 4, a crowd of people equipped with pictures and Rainbow Flags swarmed the Brooklyn gas station where an out gay man, O’Shae Sibley, was stabbed to death on July 29 in an apparent act of anti-gay hate. The crowd that poured in to pay tribute to Sibley continued to swell throughout a demonstration that lasted for well over an hour, spilling into the intersection of Coney Island Avenue and Avenue P in Midwood — a neighborhood north of Sheepshead Bay. What seemed to be a crowd of dozens of people soon ballooned into a crowd of hundreds, eventually shutting down a busy commercial intersection during Friday rush hour.