Hmmm...I guess it isn't the best book for someone that doesn't already hold Christian beliefs.
The Christians that believe that there is no Hell are simply weak Christians. Many people think of every Christian as a Bible thumper and therefore are turned off by them. These weak Christians know this, and they feel that if they compromise with society, then they will fit in. These are the same kinds of people that believe in theistic evolution(the thought that God created evolution). They are compromising the Bible's teachings so that they will be less hated...
