Think about how silly that post is.
The members of that mob would have been some of the regular people of the town, the libertarians and leftists who’s inner beliefs and tolerance, and anti-social conservatism shaped the town, they weren’t at the house espousing political philosophy.
Even libertarians can be violent, ask the typical pusher, or pimp, or porn producer, or abortionist, if they ever get drunk and rowdy.
You insist on straw-man arguments.
The defining characteristic of libertarianism is the "non-aggression principle", which states that no human being holds the right to initiate force or fraud against the person or property of another human being.
Anybody in favor of violent rape is not acting on libertarian principles.