The Freedom of Speech and Extremist Views

Should free speech include the freedom to have ‘extremist’ views?

Freedom of speech should include the freedom to hold extremist views. Because freedom of speech is important, when the government fails to listen to the voices of the people for a long time, it can cause more serious problems, such as riots. And it’s hard to define what speech is extreme, and there’s a good chance that the government, in order to protect the rights, will treat speech that it doesn’t agree with as extreme. What issues are raised by anti-extremist legislation?