Eyewitness reports one of the first people to break a window at the Capitol wearing a US flag shirt but took it off and tossed it in bush after. Others in dark clothing urging people to rush forward, starting anti-govt chants in crowd... -Jack Posobiec
If the protestors (and not just Antifa) had made a real effort to break into the Capitol then that would have been bad optics.
There were reports ahead of time that Antifa was planning to infiltrate, so why wasn't there a line of men pushing back on anyone trying to break into the Capitol?