I feel we're riding a knife's edge and there's a hurricane brewing in the gulf of absurdity.
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Incidentally, I feel like this is why it is so hard to actually learn from history. You can read about the 1918 'Spanish' Flu, but you think "we're smarter now". etc.
I would go so far as to say going to meetings physically was also a counterbalance.
When you're around other people, even ones who share your beliefs, and say 'I think we should murder that guy!' then in most crowds someone is going to say 'Hey fellow, are you okay?'
It's when you exclusively socially exist in online spaces that the most extreme actions suddenly become encouraged.
Or as Josh Johnson recently quipped, "The internet is all gas no brakes."
We might be thinking of different types of gatherings/meetings. Specifically, I was thinking of someone with a particular set of extremist ideals that get together for a monthly meeting with others with those same extremist ideals. Someone in that group would likely not say "are you okay" rather they'd say "hellzya brother!" or whatever they'd actually phrase it. These types of meetings are also known to have someone speak intentionally seeking to get a member to act as a lone wolf to actually carry out the comment you're hoping someone would tamper. Now, one doesn't need to go to meetings for that encouragement. They just open up whatever app/forum.