The violent assault on the US Capitol by supporters of President Donald Trump underscored how unready the United States is to confront its growing right-wing extremist threat, despite years of warnings.
The FBI only acknowledged three years ago, after several mass shootings, that the far right poses a significantly greater terror danger than Islamic jihadists.
Yet law enforcement was unprepared when an array of groups of die-hard Trump supporters, QAnon conspiracists and white...