There is a general tendency in people to belong to a belief system in order to have satisfaction and security - these are the two primary things by which the ego sustains itself. As a result, people develop emotional attachment to the system they adopt and, hence, end up having conflicts with those belonging to other systems. It can even take them so far as to have war between nations. The emotional attachment prevents them from investigating into esoteric matters without bias. They would see rather what they want to see than what there is. They allow their minds to be enslaved by the system and so they become incapable of open-minded investigations. This leads to unawareness of the conditioning that controls their psychology. They would find it very difficult to release themselves from the slavery as it would lead to a feeling of acute insecurity in them.