1. He had the same question, but he later became a Christ follower. That means, he understands fully where you are coming from.
2. He could change, and he believes, you are capable of changing also. When you do, you will see the light, and the whole truth.
Even if you can't, or you won't. He meant no offense.
The Bible says in Proverb 9:8,
Do not rebuke a mocker or he will hate you; rebuke a wise man and he will love you. So don't bother correcting mockers; they will only hate you. But correct the wise, and they will love you.
I believe, if you were really wise, you would have appreciated what we'd said. No offsense, I am just telling the truth.