This is a thoughtful question — and it touches theology, sociology, and personal identity all at once.
Let’s separate it carefully.
First, someone who:
• Identifies as Christian
• Believes God is real
• But is skeptical about how God is defined in Christianity, Judaism, and Islam
That person is not an atheist.
An atheist, by definition, does not believe in God (or gods).
If he believes God is real, he is not atheist.
So what is he?
There are several possibilities.
1. Cultural Christian
In places like the United States, many people identify as Christian culturally — meaning:
• They grew up Christian
• They attend church occasionally
• They value Christian moral teachings
• But they question formal doctrine
This is common and doesn’t automatically mean “lukewarm.”
2. Theistic but Doctrinally Skeptical
He may believe:
• There is a Creator
• But human religions may misunderstand or misdefine God
This position is closer to:
• Theism (belief in God)
• Possibly Deism (belief in a Creator not fully described by religion)
This is intellectually different from atheism.
3. “Lukewarm Christian” (Theological Term)
The phrase “lukewarm” comes from the Book of Revelation (Revelation 3:16).
In Christian theology, a lukewarm believer:
• Claims faith
• But lacks commitment, obedience, or spiritual passion
However, skepticism about doctrine does not automatically equal spiritual indifference. Someone can be deeply serious and still question theological formulations.
4. Agnostic Theist
He may believe:
• God exists
• But humans cannot fully define or understand Him
That position is often called “agnostic theism.”
The Key Distinction
The real dividing line is not:
Does he question religion?
The real dividing line is:
Does he believe God exists?
If yes → not atheist.
If no → atheist.
Everything else lies on a spectrum.
Now a deeper question (philosophically):
Is he rejecting God —
or rejecting human descriptions of God?
Those are very different things.
Many serious thinkers — even within Christianity — have wrestled with how human language limits our ability to describe the divine.
If you like, we can go one layer deeper:
Is this skepticism intellectual, emotional, or moral?
Because each leads to a different classification.
What prompted this question?