FRONTLINE

>> I think about a revolution against the government. We're past the point of peace. >>

NARRATOR

From Charlottesville... (rioters shouting) to the assault on the Capitol. >> Fight for Trump! >> One of the darkest days in the history of our nation. >> We're seeing this country fall apart before our eyes. >> How the former president galvanized an army... >> Who's our president? >> (Proud

Boys chanting)

Trump's our president! >> You've got a guy who's a nationalist in the most powerful seat in the world. We can actually win; we can actually get our views represented. >> Proud Boys, stand back and stand by. >> Trump encouraging calls to lock Whitmer up... >> Lock 'em all up. >> The far right militias have felt much more licensed to publicly engage. >>...a terror plot to kidnap Governor Gretchen Whitmer. >> And so you think the guys were planning to arrest her? >> It was gonna be a citizen's arrest. >> Two militia groups who were preparing to kidnap and possibly kill me. >> If you don't fight like hell, you're not gonna have a country anymore. >> Violent mobs stoked by the words of President Trump stormed the building. >> They were hostile, they were venomous, that their country somehow was being taken away from them. >>

NARRATOR

In the aftermath of the 2020 election, how these groups have become part of the American political landscape. >> What was the roll of the Boog Bois on that day? >> There were some Boogaloo Bois in the crowd associated with us; they weren't there for Trump, they were there just to mess with the federal government one more time. >> Over the last several years, "Frontline" and ProPublica have been reporting on the rise of hate groups... >>...about what you were doing in Charlottesville last year. >>...and their violence. >> What do you think was going on in this house? >> They were making bombs. >> Now, correspondent A.C. Thompson investigates the surge of far-right political violence. >> What do soldiers and Marines bring to the Boogaloo? >> They bring training and expertise in certain areas. >> They have decided this is a strategic initiative for them; there's a real, legitimate fear. We've got to be vigilant about it. >> I'm afraid that more innocent civilians are going to be targeted and actually victimized by these violent offenders. Everything that we have predicted has come to fruition, and it's actually worse. >> The first in a series of films on the rise of extremism around the world. >> We definitely are the modern militia. We're the ones crazy enough to actually do something.