Actually, I'm not offended, just annoyed with your way of phrasing it.

Oh, for the love of...
Atheism is the LACK OF BELIEF in a god, not the belief that there is no god! They sound similar, but there's a difference!

If that's the case, where did this intelligent being come from?

Um...
Definition of religion: "the belief in and worship of a superhuman controlling power, especially a personal God or gods."
Definition of atheism: "disbelief or lack of belief in the existence of God or gods."
Atheism has no sort of holy scripture, or rituals of any sort. I just go about my life without participating in religious activities.
Atheism is not the faith that there is no god, it's a lack of belief in a god.

Yup.
Only I'd say that Karma is slightly more sadistic than Izaya.