There’s even more details on other news articles. The guy was making explicit threats to a lot of people:

"I want to stand over Bragg and put a nice hole in his forehead with my 9mm and watch him twitch as a drop of blood oozes from the hole as his life ebbs away to hell!!” he wrote

"The time is right for a presidential assassination or two,” Robertson reportedly wrote in a September 2022 Facebook post. “First Joe then Kamala!!!”

"Hey FBI, you still monitoring my social media? Checking so I can be sure to have a loaded gun handy in case you drop by again,” he wrote in one post.

https://www.google.com/amp/s/nypost.com/2023/08/09/who-was-craig-roberston-utah-man-shot-dead-in-fbi-raid/amp/