You might also try studying history; you can find many examples of people civilly discussing absolutely horrific ideas that resulted in enormous harm to people. That civil discussion enabled the harm.
If you would like to civilly promote your notion that black people aren't really human and are only fit to be slaves, then no, we can't do that. If you bring it up I will tell you are an asshole, and if you persist, I will shun you and tell everybody else to shun you.
You are free to say terrible things. I am free to exercise freedom of speech and freedom of association in response. Your freedom of speech is not freedom from consequences.
If you are scared of that, then maybe take some time to think about the opinions you're so excited to share. Maybe they're harmful to others.
Can somebody tell me that this ment seriously?
In case its not irony, the harm never originated from the discussions- the "discussions" the had on eugenics and various other horrid things, where the same thing we have today. People wrapped in echo-chamber bubbles, glueing "evidence" to the wall of these echo-chambers.
Its actually easy to identify such discussions. They are not aimed at research for a remedy. As in a real, root cause remedy. They want to wrap it in a social construct, or declare it a fact, so it can be put on a podest. These discussions end not in further research, but in "we have the facts/rules figured out, now lets make history" atrocities.
Such pseudo discussions happen on the left and on the right side. You know that you are in one, if you cant press a certain point without hostility. "So what is the root cause?"(Repeat in left discussion) "What can be done to fix that?" (Repeat in right discussion)
If you have evidence that harm never once originated from people saying words, I'd love to see it. Otherwise, I think you're making an assertion that you'd like to be true.
Discussions have effects. That's why we have them.
Censoring free discussion is actually harmful.
If somebody has an, honest reasonably considered question that they would like to raise after having done at least a modest amount of work to answer themselves, sure, let's talk about it.
But most speech isn't like that. It's persuasion, advocacy, negoiation, action. Indeed, the Google manifestbro was quite clearly advocacy. It wasn't a question. It was a ten-page screed meant to convince. In specific, to convince people to act differently. Those actions will have real-world consequences. It is entirely unshocking that people who would be harmed by those consequences will vigorously object.
Nobody is talking about censorship here: https://xkcd.com/1357/
We are talking about one person saying something and then other people exercising their freedom of speech and freedom of association in response. The guy certainly has the right to claim that women are biologically inferior. But his coworkers have the right to tell him that a) he's wrong, and b) he's an asshole. And Google has the right to say, "Thanks for your service; see you later."
That's freedom. If you don't like it, well, you have the right to say so.