Malaikah is right. If he wants to proove something with the Bible, then he first has to proove that the Bible is authentic, right? Except that, there are places in the Bible where Jesus undoubtfully claims that he (a.s.) is not God, so it would be ridiculous to take one part of the Bible, and ignore another part... MAybe this could help at least a little a bit:
Common Christian Misbeliefs addressed in Question and Answer format.