Vulnerable users increasingly felt the effects of Karl Popper's Paradox of Tolerance, that if we include in a more tolerant discussion those who are less tolerant, they will prevent the discussion from being fully open. (Thus, in Popper's view, some level of "intolerance towards intolerance" must be exercised even by the tolerant.)

cultural evolution can lead to genetic evolution. "The classic example is lactose tolerance," Waring told Live Science. "Drinking cow's milk began as a cultural trait that then drove the [genetic] evolution of a group of humans." In that case, cultural change preceded genetic change, not the other way around. 

Observing the wider world, Beatrice wrote of "Russian communism and Italian Fascism" as "two sides of the worship of force and the practice of cruel intolerance" and she was disturbed that "this spirit is creeping into the USA and even ... into Great Britain."[16]

as once marginalized groups demand a seat at the table, politicians have found a new audience for old-fashioned appeals to racial and ethnic, religious or national solidarity

Big corporations have been doing this for a while. In 1027, after Trump implemented the travel ban on people coming from countries that sponsor terrorism, Airbnb responded with an ad during the Super Bowl called “We Accept.” It featured people of different nationalities and declared, “We believe no matter who you are, where you’re from, who you love or who you worship, we all belong. The world is more beautiful the more you accept.”