If all mankind minus one were of one opinion, mankind would be no more justified in silencing that one person than he, if he had the power, would...

I would argue that we should wholeheartedly embrace this ideological perspective.  We should allow everyone to speak their mind, regardless of what they think.  However, this does not mean that we should let people speak their minds without challenging them and letting them know that we disapprove of their ideas when it is necessary.

I would argue that the freedom of speech is a fundamental human right.  People have the right to believe whatever they...

I would argue that we should wholeheartedly embrace this ideological perspective.  We should allow everyone to speak their mind, regardless of what they think.  However, this does not mean that we should let people speak their minds without challenging them and letting them know that we disapprove of their ideas when it is necessary.

I would argue that the freedom of speech is a fundamental human right.  People have the right to believe whatever they want.  They also have the right to try to convince people that their opinions are correct.  (Please note, however, that this right extends only to discussion of ideas, not to the point where people are trying to stir up violence against one another.)  If we deny this right to people who think unpopular things, we will eventually end up with a society where there is no freedom of speech and the government or the majority can simply control what people are allowed to say.  This would be disastrous as there would be no way left to speak out against government abuses or against the majority if it did things that were morally wrong.  Therefore, we need to protect the freedom of speech zealously, even when (or perhaps especially when) we disagree with the ideas that the speaker is proposing.

However, this does not mean that we should just let people say what they want without challenging them.  When a politician says that we should order our soldiers to kill the families of terrorists, we should allow the politician to say that.  However, we should then speak out loudly, making sure that he knows that we disapprove.  We should not try to shout him down.  Instead, we should explain why our views are superior to his and why his views are dangerous.  It is wrong to let hateful or harmful speech go unanswered, just as it is wrong to try to prevent someone from uttering hateful words.

For these reasons, we should embrace this ideological perspective completely, but we should do so without giving up our right to speak out against ideas that we abhor.