It looks like that he was not some how forced to work in a hospital laundry, or denied "meaningful work". Rather, personal choices centered on work discipline can make more advanced positions difficult to obtain.
That aside, I wonder what Noem means by "radicalization"?
No evidence of a manifesto with RL. No social media declaring allegiance to ISIS, Al Queda etc. No "justifications" by RL using the koran. And... apparently no Islamic terror group has claimed him.
I am thinking that, well, in a dark way, RL committed an "American" attack:
I don't like my life for a variety of reasons. I could well have moderate to heavy substance use. No immediate hope for a better future. The fact that I am responsible for my own predicament is ohhh so not relevant to me.
So.... time to rampage. And.... as
@Telltale illustrated, the rampage was going to be a little more attention getting getting than shooting it out with police officer in small town USA during a traffic stop.