Exhibiting a personality that is a common characteristic of all personality disorders. is incompatible with western cultural norms is split off, or dissociated, from one's core sense of self is borderline or narcissistic differs markedly from the expectations of one's culture

the answer is: differs markedly from the expectations of one's culture 
One of a characteristic of a personality disorder is eccentric behavior and discomfort in forming close relationship with other people. Eccentric behavior could only occur if the behavior is widely different from what commonly displayed by most people within a certain social group.

Secular humanism is a belief system that prioritizes the study and progress if human interests over all others
This belief system does not recognize any unexplainable beings and does  not support the existence of God

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