A person can rationalize literally anything. You have to understand this. If you really want to believe something you will find a way to justify it to yourself. Most people jump to emotional conclusions and develop after the fact rationalizations for them, and never realize that nothing about this process is actually rational.

It takes good mental discipline to be able to organize your thoughts such that you can see whether your beliefs are motivating your reason or whether your reason is motivating your beliefs. Most people will never be able to do this.