Check out the paradox of tolerance and Goebbels's thoughts on the matter:
https://alphahistory.com/nazigermany/goebbels-on-the-reichst...
This is a good quotation.
One thing is just speaking, another, speaking and voting in a parliament.
OTOH I like the idea that every new Parliament member should bring an idea which is currently illegal, and work on integrating it into the legal framework. Thus is how all change (to the bad and to the good the same) occurs in a peaceful way.
It's interesting to note how many now-mainstream ideas were fringe 30 years ago, and outright scandalous 100-150 years ago: universal suffrage, social security, gay marriage, legal marijuana, etc.
You can say most things against the current discourse on many forums as long as it’s not illegal/viciously bigoted. I feel that amount of “freedom” is enough as any more freedom takes away others freedoms.
Not many. Anonymous boards are some of such places.
Even if you think that some people are patently wrong on the Internet, dangerously and irredeemably wrong, it's more useful to be aware that such people exist, than to hide this fact from yourself in order to have a quieter sleep.
Freedom is, by definition, also freedom for those you disagree with, despise, even hate. If either side forces their (doubtlessly, virtuous and well-founded) views on the other (doubtlessly, misinformed and stubborn), I have a hard time calling it freedom. It's a standard ideological oppression.