the (Non)Difference Between Muhammad and Eric Harris

I'm confused. I hope somebody can help me. I can't figure out what the difference is between Eric Harris (1981-1999, of Columbine infamy), who put on his website, "My belief is that if I say something, it goes. I am the law, if you don't like it, you die" . . . .

Eric Harris

. . . and Muhammad, who said in his Qur'an that (and I paraphrase) "my belief is that if I say something, it goes. I am the law, if you don't like it, you die."

. . . Well, other than the fact that pictures of Eric Harris are easier to find on Google than pictures of Muhammad, is there anything else?