Because the people who "like" calls to genocide and murder, and stockpile weapons... are the kind of people that you don't want running around in society? It's

Because the people who "like" calls to genocide and murder, and stockpile weapons... are the kind of people that you don't want running around in society? It's not like they are arrest everyone who liked this photo. Just this one particular person who showed a pattern of behavior that advocates murder.