Spoken like someone who hasn't spent much time on reddit recently. Since the massive surge in white nationalist, alt-right, and other right-hate ideologies online (and particularly the creation of the_donald, a subreddit which has shockingly avoided the ban hammer for an inexplicably long time given its obvious explicit purpose: to be an echo chamber to spread hate, scream slurs, threaten people with death and genocide, and dox enemies).

In literally any part of reddit, if there is any post on anything that could be construed as racial or about any gender, even innocuous, hordes of extremist right wing trolls descend upon it and spew horrifying screeds of hate. They abuse people into silence. They are toxic. These things leak. And toxicity is real. Hate begets hate, saying nasty horrible things to people and advocating for genocide are not innocuous "beliefs that other people might have" they are unacceptable behavior in civil society.

If you do this in real life you are ostracized, beaten, you lose your job, you are abandoned by your family and friends. And this is good. Social signals and actions to prevent "toxic" behavior have existed since forever. But the Internet is the property of a few companies who are loath to enforce those same social rules. Sometimes, they get pushed far enough they feel have to.