"John Brockhoeft" is a name I haven't heard in a very long time. And people need to be very concerned that Army of God terrorists were involved. They've been laying low for a long time, and I guess that means they've been biding their time. https://twitter.com/VICENews/status/1349821459410128898
A lot of the pseudonymous people given shoutouts in the Army of God Manual have never been publicly identified, and the ones who have were identified after committing arson, bombings, attempted murder, or murder that they were arrested for.
I have a copy of a significant portion of the Army of God Manual that I tracked down online before it got taken down, and that's a whole section on sleeper agents. There's also discussion about when suicide bombing might make sense (if you've got a terminal illness).
It also includes the idea that if you've got six months to live, you should go on a cross country bombing spree because by the time they catch you, you won't have much time left to spend locked up before dying.
It also specifically spells out that the best way to not get caught for doing bombings is to establish yourself as an activist committed to nonviolence in your local community, and only do bombings in places no one would expect you to be.
That's likely why a lot of abortion clinic bombings and arsons over the years have been unsolved. The people who get caught either are sloppy or want to get caught, but the "peaceful" activist you know might only be peaceful in your city as a cover.