Here is a question for you

The question is this:  What do you do, say, when someone questions the very thing that your whole entire faith relies on, the Word of God, The Bible?

Let me put it another way, someone claims to say that Jesus is Lord and believes that his death represents his salvation and believes in everything Romans 10 stands for, but yet with the same lips, denies the Bible as the very word of God because of James 5 (laying of the hands and healing, or killing a 15 year old girl in Leviticus...etc.,)

What do you say?