How did that militia group get so radicalised? Perhaps they need deporting to the Yemen or somewhere that sort of roaming armed militia behaviour is expected from radicalised religionists.
We can thank the republican party for that. They couldn't get elected on their own merits, so they had to find a group of voters who were in the habit of believing things in spite of the evidence to the contrary, that they could convince to vote for the republican candidates, and against their own best interests. And there they were: the Bible literalists. Folks who have devoted their lives to believing things that are countered by the evidence.
All the republicans had to do was start playing on their fear, ignorance, and prejudice, which are considerable, and they had an easily manipulated and very "motivated" voting block to help put them over the top and get their toady-for-the-rich candidates elected. All they had to do was tell these "believers" that the queers were brainwashing their kids in the schools, or that the democratic candidates want to take their guns, or is a Muslim, or that the opposing candidate has sired interracial bastard babies (as they claimed about John McCain), or some other slanderous idiocy, and the Bible-believers would run to the poles in droves to vote against them, and thereby to vote for any sorry candidate the republicans put forward. And they're STILL falling for this trick 25 years later!
Now, they all believe the nation is being destroyed by queer-loving, gun-hating, terrorist-supporting, baby-killing, liberal democrats. Because these people have believed all the idiotic slander the republican party has thrown at them. And with all that fear and animosity building up in them it's no wonder they're "radicalized". The problem is they're also insanely ignorant of the truth of things, and they just don't care. Because the facts of reality have always been their 'enemy'. So all their anger and energy is completely misplaced, and they don't even care that it is. Believing what they believe is all that matters to them. Belief is truth for the terminally self-righteous.
It's a sad saga in American history, for sure. Now these folks are so crazy, and so seething with misplaced anger that the republican party can't control them, anymore. And they're beginning to tear the party apart with their insanely radical rightist attempts to turn America into some theocratic fantasy "Bibleland" while the republicans themselves are busy trying to rob the nation blind for their wealthy patrons. It'll be a miracle if we survive the onslaught of greed and stupidity.