What are we frightened of?
Why are we preventing people from voicing their opinions, and how can we do that in the name of free speech?
On a planet as populous as Earth, there have to be differing points of view about almost everything. It's what being human is partly about.
We are blessed with different, sometimes contrasting perspectives, no matter what we are looking at, listening to or experiencing.
To stop someone voicing their perspective, their opinion, is to take a point of view and make it official - this is the standard, and all others are wrong and therefore must not be spoken.