Thousands of demonstrators sing the words, “We are all one,” while raising their fingers and holding images of slain Florida teen Trayvon Martin at a protest called A Million Hoodies March in New York’s Union Square on March 21, 2012. Martin, 17,  wore a hooded sweatshirt when he was killed last month The peaceful protest was organized by black and white college students, many wearing grey hoodies to symbolize the racist stereotyping that led to the death of Miami teenager Trayvon Martin. Hundreds of protesters holding bags of Skittles and cans of Arizona iced tea joined together for a “Million…