There's nothing inherently wrong with being a psychopath. The problem is that they tend to be extremely manipulative and selfish. Of course, if someone identifies "self" with some larger social project or humanistic goal, then manipulating people into achieving this goal can be an incredibly valuable skill.
"Of course, if someone identifies "self" with some larger social project or humanistic goal"
Such people can be the worst of all. They would have no compunction against mass slaughter. Utopianism in general has led to great evil because it is inherently unrealistic, and because it defines itself as the paramount good, surpassing all other goals, it can be used to rationalize very evil acts.
