I think this is true to some degree, and Seagypsy has made this point too. There probably are some people who either love to hate or they love violence and are drawn to violent ideologies or violent interpretations to justify what they would have done anyway. But I don't think it's so black and white. Some ideologies do cause irrational hatred and violence in some circumstances.
I think I know what you are trying to say. That religion can teach irrational ideals. but to a person who is capable of rational thought it wont last. I grew up being told by my baptist great grandmother that black people were the descendants of Cain and therefore evil. I was too little to argue religion with her and I never asked anyone if what she said was true so no one refuted her. I also didn't know any black people personally. I did see black people on the news quite often being arrested and I was told that the police were the good guys. As a child I had no reason to think my great grandmother lied. But my brain doesn't work like that. I have never been able to take anything anyone has told me as "GOSPEL TRUTH" . I never challenged my great grandmothers assertions but never accepted them either. The first man I married was black and I have 3 beautiful mixed children from him. My fourth child was from second husband who was Pakistani. My grandmother has plenty to say about Pakistanis. I have met plenty that do not live up to her descriptions. Unfortunately the one I married did. But it is not my nature to accept blindly any anyone tells me. Even the pastor of my church got annoyed with me when I would constantly ask him 'WHY?'. There is a basic human nature but we are all still individuals. Some of us are more inclined to accept as fact whatever makes us feel good and whatever "proves" we are right. Some of us have a domineering nature, some of us are more submissive. People with hateful natures tend to interpret their faith as justifying hate. Those with compassionate natures tend to interpret their faith as being compassionate. Perhaps because of my inquisitive analytical nature I am unable to see the justifications for violence in Islam that others see. It may also be my reason for not believing in the existence of evil or good. My nature surely affects my interpretation of reality and influences the types of experiences I have. It is kinda like watching people on a roller coaster. They are all having the same physical experience. But some are terrified, some are laughing, some are totally thrilled and some are bored. The nature of each individual is affecting their interpretations of the experience.