Well, God of Islam is not perfect either. He certainly doesn't know how to justify his actions. The same commandment is found in the Quran "Thou shall not kill", but in other verses it urges Muslims to kill and torture all the unbelievers, in addition they will be rewarded in this life and in the afterlife. But, God seems to contradict himself very often, when in another verse, clearly says:" ...if any one killed a person, it would be as if he killed the whole of mankind"
"Sometimes I'm confused by what I think is really obvious. But what I think is really obvious obviously isn't obvious..." - Michael Stipe