A perfect summation of what @beeble is doing and shitting up threads.Tom O'Carroll isn't developmentally messed up or of abnormally low IQ. He wasn't sexually abused as a kid. He's decided it's OK to have sex with kids and uses his intellect to rationalize that and convince others it's fine with word games.
E.g. the rather naive interviewer asks him about him seeking out jobs where he'd be in proximity with children which he would then abuse and if this is obsessive and predatory. Look how slippery he is in comparing this to the way men in sexually repressed Middle Eastern countries turn to homosexuality.
I.e, it's all society's fault! If only we were all a bit more accepting of his predatory behavior. Though of course, he quibbles about the semantics of the word predatory, pointing out when animals are predatory they're trying to kill each other whereas he was just looking for a relationship! Oh and that being 'obsessive' isn't necessarily a bad thing - most Nobel Prize winners were 'obsessive' after all.
This is what evil looks like - some guy going through life doing enormous damage, being utterly indifferent to it and batting away criticism by quibbling about semantics.