Libertarians are the cruelest. A libertarian administration would let the hungry starve, the sick perish, and the poor remain poor. It would allow mistreatment of animals and destruction of the environment. It would allow people to waste their lives away with drugs, gambling, prostitution and other vices still unimagined. The worst in humanity would compete freely with the best.
Libertarians are a cult.
Libertarians have their own special beliefs and jargon wildly at odds with prevailing cultural norms. The Libertarian Party members must sign an oath when they join. They believe they are a global revolutionary movement with the force of morality behind it. Those infected with libertarianism rarely return to more conventional political beliefs. Many libertarians are heavily armed and believe the government is their enemy.