Or a discharge for being connected to the wrong crowd...
If he belonged to this group :
Which I’ve never heard of and which looks really lame and amateurish and probably has a dozen members... I wouldn’t be surprised if he was discharged with good reason.
When I went to basic combat training at Fort Leonard Wood we had a Nazi painting murals in the orderly room. He had joined to learn small weapons (gun-smithing) and had been found out as a Nazi.