Defecting from religion

Why do people give up their faith?  Why do they change from one faith to another?  From having a faith to not having one?  Or from not believing in God to believing in God?

Then, does one remain with one's convictions?  Or does one change one's mind after a matter of weeks, or months, or years later?

http://learnislam1.blogspot.com.au/2010/05/defecting-from-religion-new-trend.html carries some insights into this question.  It describes such changes as a "new trend".  It tells about people who have been dissatisfied with church.  Some of the reasons for feeling dissatisfied has been

• unequal treatment
• not agreeing with policy
• feeling confused about what to believe
• needs not met
• expectations not met
• did not feel God close to one
• not happy

How should church change so to address these issues?

Should church change to suit the people?  Or should people change to suit the church?  How about changing to be more like God, in spite of what the church thinks?

How about changing to fit in with what God expects, rather than what church or religion expects?

Does defecting from church to a religion address these issues?  Or will one still end up feeling dissatisfied after a while?

What do you think?