Any God believer able to refute chapter 4 of the God Delusion by Richard Dawkins?

I've read the God Delusion and chapter 4 is titled "Why there almost certainly is not a God". This chapter is brilliant. It's argument is flawless. If you are an atheist I advise you to read it. If you believe I advise that you should really read it!!!! Basically, It argues that most people argue for God by a series of regression questions. They then use God to terminate as the origin. What they fail to realise is that God's origin is not explained. Something as powerful, large and complex as God needs an explanation. God agravates the problem and does not explain it. I have yet to see a believer even try to answer the problem posed by the good professor. Anyone wanna try to explain their objection to this very powerful argument?