In true cult like fashion, all the reasons why someone might become an apostate are due to faults with the individual. Never does a cult member consider that the fault may be with the organization itself.
This is what I like to call, "Starting with the CONCLUSION."
Which, in this case, is: The Organization is Always Right, EVEN When It's Wrong.
The easiest way to develop this mentality is to allow someone else to think for you.
If you think for yourself, you will not fall for this.