Then why don’t you believe him when he commands us not to worship false gods?
I certainly wouldn’t hold anything against the person. I would share my religion with him and try to make him understand who the real god is. You can go through all the other holy books and prove them wrong one by one, except for the Bible. Why do you think you still set your watch to Jesus Christ? Don’t be converted then. All you can do is share what you know in a friendly way. Plant seeds and hope the person ends up seeing for themselves. Free will. It’s a beautiful thing. And the god of the Christian Bible gave it to you.