"I have a friend who comes from some place in central Asia. He says that the earth is perched on the back of a giant elephant, and the elephant is standing on top of an even larger turtle. Ya know, I don't think I would be willing to die to protect his right to say that." ― from a movie I saw many years ago
It's not about individual sayings.
It's about expression. When a society limits or inhibits expression, it only limits and inhibits that society.
Think of all the speakers of history who altered the face of society. Imagine what we might be experiencing today if the expressions of voice and art and music had been silenced.
If Martin Luther King Jr. never told us about his dream.
If "Rett Butler" hadn't said, "Frankly, my dear, I don't give a damn."
If we could not view the Mona Lisa.
Sure, there are a lot of examples of expression we do not agree with. We don't believe in. Many we find annoying or absurd. Sometimes people will feel anger at what they hear. They might feel insulted or offended. Allow them to feel that way. Allow them to examine those feelings. Many forms of expression tell us what we already know and many that tell us nothing at all. Yet, how many tell us what we need to hear even if we don't wish to hear it? There are many that make us think, re-analyze, self analyze and even, change our minds.
There is nothing greater than hearing and seeing opinions different than yours. In science, in life, in religion or music or art or parenting.
We actively seek them out- we join internet groups and forums to read, discuss and argue about each expression.
When these are limited or inhibited, that society cannot examine differences anywhere near so effectively. It cannot examine itself; grow, learn, progress. It's stagnant, non-progressive.