Future Late Night host and South Carolina native Stephen Colbert returned to his home state this weekend to take part in a massive unity march following the shooting at Emanuel African Methodist Episcopal Church in Charleston. On Sunday evening, thousands gathered to march together across Arthur Ravenel Jr. Bridge as a show of unity, after a racist gunman shot and killed nine people attending a Bible study at the historic black church last week. A few of the fellow marchers spotted Colbert (like @gerald72 who posted this picture to Instagram), and even Colbert documented the event on social media, posting a brief video from the bridge with the caption “Peace and Love and Unity in the Holy City” to Twitter …