Capitalized or not, it's a god. I don't believe in it, but respect those whose Christianity I recognize from my years as a member of the American Lutheran church dogm746
religious: Having or showing belief in and reverence for God or a deity.
dogma:(Christian Religious Writings / Theology) a religious doctrine or system of doctrines proclaimed by ecclesiastical authority as true
If that be so..
A. He does not believe nor does he show reverence for God.
B. He does not believe in any religious doctrines proclaimed by ecclesiastical authority as true.
You referring to God as god also shows your degree of reverence for God..
He believes in God. He's just not told what that God is and how to behave by anyone but the Bible. Directly. No preacher man in between.