Social justice mobs never apologize when they're wrong, and will destroy one of their own without a second thought

"Barrett Wilson" (a pseudonym, since the writer now fears his former online compatriots), writes at Quillette, July 14, 2018 (emphasis added):

In my previous life, I was a self-righteous social justice crusader. I would use my mid-sized Twitter and Facebook platforms to signal my wokeness on topics such as LGBT rights, rape culture, and racial injustice. Many of the opinions I held then are still opinions that I hold today. But I now realize that my social-media hyperactivity was, in reality, doing more harm than good.

Within the world created by the various apps I used, I got plenty of shares and retweets. But this masked how ineffective I had become outside, in the real world. The only causes I was actually contributing to were the causes of mobbing and public shaming. Real change does not stem from these tactics. They only cause division, alienation, and bitterness.

How did I become that person? It happened because it was exhilarating. Every time I would call someone racist or sexist, I would get a rush. That rush would then be reaffirmed and sustained by the stars, hearts, and thumbs-up that constitute the nickels and dimes of social media validation. The people giving me these stars, hearts, and thumbs-up were engaging in their own cynical game: A fear of being targeted by the mob induces us to signal publicly that we are part of it.