Other articles covered the details better than this one.  He was apparently outright disruptive to the nursing staff, yelling, and while he was pointing out real potential side effects he seemed to have left out a very important contextual details.....the extreme rarity of side effects.

If you read article that do a better job of fleshing  out what he did, it appears to be pretty clear that if he isn't an outright "anti-vaxxer", he really acted inappropriately.