When you consider that he has been at the top of his profession, has had a lifetime to prepare, and has recently published a book on these themes, it is quite surprising to see how weak his case is. Don't take my word for it. Let's plunge in.
There are many different religions in the world, and they make contradictory claims. They cannot all be true. Why therefore should we think any of them true? Is it not just a matter of chance what we believe?