There’s no contradiction. This man is a Christian.
You’re the only one here who questions this man’s faith. You are putting down stumbling blocks.
If the man were to say that he found Christ through other denominations, I would be thrilled, because this man has been saved.
Is it to much for a professed Christian, as you yourself are to be happy that someone who was once lost was found?
Or do you not believe that Catholics are true Christians?
Catholics are Catholics and Christians are Christians...They can be one in the same but I don't believe that to be true in most cases...