Footage of hundreds of masked men storming Washington, D.C., with Confederate flags spurred an outcry online Saturday.An estimated 400 masked men, whom Reuters reported were with the right-wing extremist group Patriot Front, marching into D.C. on July 4 with Confederate flags, online video shows. On X, the video spurred outrage. Former GOP congressman Adam Kinzinger called the marchers "such cowards" in a post on X. "Show your faces b—.""Bunch of loser cowards," reacted Richard Nephew, a senior researcher at Columbia University and former White House official. "Yet traitor flags are a nice reminder that 163 years ago, their ancestors lost at Gettysburg. May that anniversary also inspire 'increased devotion to [the] cause..that gov't of the people, by the people, for the people, shall not perish from the earth.'"Journalist Nancy Levine Stearns suggested, "Every Republican rep in Congress should be asked if they support Patriot Front, American Nazis."Former GOP strategist Jeff Timmer joked, "If you've ever longed to experience the vibe of a good ol' fashioned Nuremberg Rally without all the massive crowds, well, Trump's 4th of July MAGA-Bund Fest is the place for you to savor the best of both worlds.""Maybe Republicans should spend more time condemning stuff like this and less time condemning the mayor of New York," proposed British-American journalist and TV host Mehdi Hasan."They wave the American flag yet they are traitors to this great nation, and choose to express their hatred of its founding principles on the day of its birthday for the attention," wrote Aaron Reichlin-Melnick, a senior fellow at the American Immigration Council.