Is Narcissistic Personality Disorder classed as a mental illness in Islam? Would a Muslim man with such a disorder and an extreme God complex be judged and held accountable in the same way as a Muslim with no disorder?
The feeling of self admiring and superiority on others is bad and harmful. Narcissistic personality is away from the teachings of all the prophets and Infallible Imams who practiced and taught their followers to always be humble and down to earth. Yet, we don't call narcissism as a mental condition which exempts the person from any responsibility. He should think properly and be more realistic and more humble. Allah will judge every one according his abilities.
'Wassalam.