Why is free speech under attack in America, and mostly affecting conservatives?

The Death of Freedom of Speech and the Growth of Intolerance

Freedom of Speech requires me to respect your right to say what I don't like to hear--even to publicly insult and humiliate me--just as it requires you to respect my right to say what you don't like to hear. And just because we have ideas that are unacceptable to each other, it doesn't make us enemies. You may be giving me the best advice in the world but I don't realize it and find it offensive. Should you be prevented from, or punished for, saying it? We are supposed to love each other despite our opposing ideas. When I recognize your right to say things I don't like, I don't get angry at you for saying them. You, in return, respect me for acting respectable. Furthermore, since I don't get angry at you, you cannot have the pleasure of getting me angry, so you don't seek to torment me with words. All wise people throughout the world understand this. It is the most basic ingredient of peace.