I do not believe to start that this was an attack against the fandom, I'd look more towards a disgruntled employee or guest. This has the makings of someone or a group of someone's making a statement of some type. Until an arrest and conviction is made I make no judgements. It is the hope that the Police and investigation authorities will exercise all available avenues. Another thought would be a civil protester (anarchist) who is trying to make a big hurrah on the events in Ferguson or New York a make a statement against the Man.