People with this malignantly narcissistic defect completely reject the needs of the individual and enslave him or her to the service of their IDEAL. Eventually, the enslavement--whether religious or secular--snuffs out human ambition, confidence, energy, self-esteem, and life. These mindlessly malignant "do-gooders" do far more harm than good and their ideologies can lead to genocidal practices and unbelievable atrocities on a grand scale, all in the name of an IDEAL or GOD.
At least the selfish narcissist is limited in the chaos and havoc he wreaks. But, the "really destructive maniacs of this world" are the ones who do it for your own good.