Andy Ngo, a photojournalist and editor at Quillette, landed in the emergency room after a mob of antifa activists attacked him on the streets of Portland during a Saturday afternoon demonstration. The assailants wore black clothing and masks, and were engaged in a counter-protest against several right-wing groups, including the Proud Boys. Ngo is a well-known chronicler of antifa activity, and has criticized their illiberal tactics on Fox News. He attended the protest in this capacity—as a journalist, covering a notable public event. According to Ngo, his attacker stole his camera equipment. But video footage recorded by another journalist, The...