“I learned all these skills in the army—smash and grabs, site exploitation—and never got to use them,” he said. “So I’m here to kind of do what I learned to do over there, but this time here, defending my country.”
Never getting to use those skills in real life is the ideal. Any sane person in the military learns a ton of skills that they hope only to use in training. Wanting to use these skills for real, and especially domestically should be grounds for psychologically screening these people out of not just the military but any sort of service position.
Using those skills can be fun in training or drills, actually. So, I get wanting to shoot, run, and do simulated combat. But why would anyone actually want to inflict that harm on someone else for real? They would have to be deeply disturbed.