As I thought I made it plain in my earlier post, I absolutely do not condone or justify in any way the violent actions of the minority of offended people; they are terrible, appalling criminals who deserve the harshest of punishments.
I was just responding to what I understood the OP to be about in general terms - wifully going out of your way to offend people for no reason whatsoever. I don't know the murdered teacher's motivation, and he in no way deserved or invited that reaction, but he must have known how offensive what he was doing would be to a great many people, so that would lead me to wonder why he chose to show the cartoons, when surely just discussing the cartoons' existence would have served the same purpose?
Yes, that nasty t-shirt is exactly the kind of thing I mean. I'm a Christian and I find it disgraceful in the extreme. Like the vast majority of peaceful Muslims offended by representations of their Prophet, I wouldn't dream of trying to hunt down the designers or printers and harming them. Truth be told, I feel sorry for them that they could have come up with any number of funny, maybe edgy or controversial, designs, but they were obviously actively hoping to deeply upset and offend a whole lot of people indiscriminately - anybody who sees somebody wearing it - by attacking a concept that clearly means absolutely nothing to them whatsoever but which they knew would traumatise those to whom it is precious. I wonder how the designer would react if, say, somebody who had managed to get a photo of their mother printed it on a t-shirt with a knife through her heart and bleeding, with a caption saying "Your Mum: Dead " (but uncensored). Would they be applauding the hilarity of it all or might they just stop for a moment and think: that means nothing at all to the stranger who did it, but they obviously set out to hurt me in as extreme a way as they possibly could? I have no issue at all with teasing, controversy, satire.... but what kind of person lives full of so much hatred of strangers?