I know of Dyce and how he behaves as an average citizen. He would watch his sons play football and Dyce never, not once said a word to the boys coach about football or coaching techniques, he was described as a very respectful man, definitely not a hot head or budinski.
Considering that Dyce was entitled to be on the sideline, and he believed this was an unauthorized person talking trash to his players, and during that point of the game, a very tense game and the situation during the moment was confusing, as described by many, barking a few words at a “stranger” can be understandable. Bob was in his workplace, and good for him he felt ownership.
Somewhat similar is a goofball fan running onto the field and being tackled by a player, because of the stupidity and disruption by an unauthorized person. Terms and conditions on being a fan certainly apply to the unauthorized antagonist as previously stated on all tickets.
Dyce did not commit any act of violence. He was in his proper place. Goofball actually travelled - walked to disrupt people going about their business and advanced towards the folks on the bench. I’d say that is more than words, it can be characterized as aggressive and provocative.
Bob Dyce actions are easily mitigated. Goofball should be banned.