John Sullivan, videographer and founder of “a group for racial justice and police reform,” posted a video on YouTube on Jan. 7 that shows him entering the Capitol building in Washington, with a group of Trump supporters and possibly others the day before. He’s heard on video encouraging the behavior and convincing Capitol police to let the trespassers through at several impasses. The video also reveals further details about the situation that led to the death of Ashley Babbitt, an Air Force veteran shot inside the building by Capitol Police. Sullivan is known for taking part in protests and riots connected with the Black Lives Matter movement, which was founded by Marxist organizers. In July, he was arrested in Utah for alleged rioting, making a threat of violence, and criminal mischief due to his part in a protest that resulted in the shooting of a motorist. “As a protest organizer, …