Then you are looking at it not from an immature standpoint and seeing it as someone with an immature agenda would see it.
Rick Warren himself advises you to do this. See things from an unbeliever's perspective. If I had an agenda I could take this book and run with it. Since I have no agenda except the Word, I am running into resistance. There's something wrong there...
No agenda except the Word?
Then you should be cheering Rick Warren on loudly, vigorously and persistently.