And I think it is actually useful. People will try to manipulate other people through emotions, and mobs are easy to manipulate. One should have fairly high barriers before joining a street mob, because its potential destructive power is enormous, and it also tends to elevate unsavory characters to positions of power.
I am not saying that those barriers should be infinitely high, but fairly high.
For us humans, it is easy to succumb to "righteousness in numbers".
It's also important to weigh the harmful effects of apathy in the balance. These are easily forgotten but almost inestimably enormous. Just think of all the damage done in the decades (centuries) where hardly anyone could be bothered to protest against slavery, women's oppression, racial segregation, pollution, etc. etc.
I think you may be proving my point. Taking one side of a complicated situation because of a black-and-white moralistic thinking is potentially destructive, and organizations like Hamas benefit from that.
As for your slavery example, did slavery disappear because humanity awakened morally and started demonstrating in the streets, or because we gained a new non-human resource of raw power? Previous civilizations didn't engage in slavery because they were profoundly immoral, but because human and animal muscle was the only practical source of power. The specifics varied across the globe, but unfree labor was ubiquitous in pre-modern societies.
For a contemporary situation, imagine a 22nd century activist judging people of 2024 for eating meat from dead animals, when he can get a good steak by pressing a button on a steak-making machine. It wouldn't be demonstrations which made the difference between 2024 and 2124.
Food is less than ideal, war is less than ideal, death is less than ideal, HN is less than ideal.
Are you satisfied with this sort of Twitter-like posting and thinking? I am not.
Pixels are basically free and we should strive to post more than one-sentence snarks. For one-sentence snarks and drive-by dismissals, Reddit is the ideal territory.