It's closely related to narcissism and sociopathy. Murdering Cluster B people might be a little extreme, and most non-Cluster B people will feel uncomfortable

It's closely related to narcissism and sociopathy. Murdering Cluster B people might be a little extreme, and most non-Cluster B people will feel uncomfortable with that idea. But most violence is demonstrably driven by certain personality types who lead the violence and normalise it. Excluding those types from leadership positions of all kinds as soon as they show evidence of toxicity is unlikely to make things worse. The alternative is on a scale from small cults to megadeaths. (Perhaps gigadeaths on a bad day.) And we already exclude most of the population from leadership and power anyway, using other reasons as an excuse.