Why throw rocks at a junkyard dog?

The Garland TX Mohammed cartoon shootings, our little version of Charlie Hebdo - ISIS is now claiming responsibility which even if true you'd think they'd be a bit hesitant as it hardly came off in their favor, not their best work you could say. Pamela Geller of her American Freedom Defense Initiative coordinated this event in TX and from what I understand it was some sort of cartoon contest for who could come up with the best sketch of the Prophet Mohammed I guess. I might be in the minority but her subway ads in NYC which the MTA had a huge problem with I don't find them the least bit offensive. I'm sure you've heard of them and they always have the angle of radical Islamists are anti-Semitic which they are so it's kind of hard for me to unravel just why the MTA has their collective knickers in a twist. However having said that what was the point of this little sketchathon in Garland TX? Are they suddenly interested in this particular faith system? Are they contributing to global culture? Was the whole affair designed to be provocative? (x) I'm thinking we have enough to worry about. Thanks guys and gals and all you Bob Ross wannabes.