Two things wrong with your comment. One:)You don't know he made a threat, or what the "threat" consisted of since they won't release that info. Two:)You don't know that he would have been fine with his prior training, and no weapons were mentioned in the article that I could see. In fact very little info except for the fact he was a vet and was arrested was given out.
The article said he made threats and had the means to carry them out.