You were more funny as "smartass". Anyhow.
If you insult what other people love, they are going to feel insulted as well. Try insulting their favorite actor, movie, book, food, music band, their country, their family, their job, their beliefes their wife, their kids. They are going to get angry, don't they?.
Well, with fictional characters is the same. So, if you find ok to agresively make fun of an entire group of fans, but wants to make a ridicoulus scandal out of an obvious joke on one guy wich was more inocent than agresive?
Relax kido, go back to creacionist.