“There is a fine line between free speech and hate speech. Free speech encourages debate whereas hate speech incites violence.”

Tweet https://twitter.com/geertwilderspvv/status/787257675952324608 (15 October 2016)
2010s

Counterterrorism and Cybersecurity: Total Information Awareness (2nd Edition), 2015

Cyber Rights — cited in [DeCandido, GraceAnne A., Cyber Rights: Defending Free Speech in the Digital Age, Booklist, American Library Association, 94, 22, 1932, August 1998]
Cyber Rights

2010s, Who's too Weak to Live with Freedom? (2013)

"Quotes", The Educated Imagination (1963), Talk 6: The Vocation of Eloquence

Address at Columbia University (1991)
Context: "Our lives teach us who we are." I have learned the hard way that when you permit anyone else's description of reality to supplant your own — and such descriptions have been raining down on me, from security advisers, governments, journalists, Archbishops, friends, enemies, mullahs — then you might as well be dead. Obviously, a rigid, blinkered, absolutist world view is the easiest to keep hold of, whereas the fluid, uncertain, metamorphic picture I've always carried about is rather more vulnerable. Yet I must cling with all my might to … my own soul; must hold on to its mischievous, iconoclastic, out-of-step clown-instincts, no matter how great the storm. And if that plunges me into contradiction and paradox, so be it; I've lived in that messy ocean all my life. I've fished in it for my art. This turbulent sea was the sea outside my bedroom window in Bombay. It is the sea by which I was born, and which I carry within me wherever I go.
"Free speech is a non-starter," says one of my Islamic extremist opponents. No, sir, it is not. Free speech is the whole thing, the whole ball game. Free speech is life itself.

Remarks by the President to the UN General Assembly https://www.whitehouse.gov/the-press-office/2012/09/25/remarks-president-un-general-assembly (25 September 2012), quoted in "President Obama Condemns Both ‘Disgusting’ Anti-Islam Video And ‘Mindless’ Violence Before The U.N." http://www.mediaite.com/tv/president-obama-condemns-both-disgusting-anti-islam-video-and-mindless-violence-before-the-u-n/ by Andrew Kirell, mediaite.com.
2012
Context: In every culture, those who love freedom for themselves must ask themselves how much they're willing to tolerate freedom for others. That is what we saw play out in the last two weeks, as a crude and disgusting video sparked outrage throughout the Muslim world. Now, I have made it clear that the United States government had nothing to do with this video, and I believe its message must be rejected by all who respect our common humanity. It is an insult not only to Muslims, but to America as well. [... ] I know there are some who ask why we don't just ban such a video. And the answer is enshrined in our laws: Our Constitution protects the right to practice free speech. Here in the United States, countless publications provoke offense. Like me, the majority of Americans are Christian, and yet we do not ban blasphemy against our most sacred beliefs. As President of our country and Commander-in-Chief of our military, I accept that people are going to call me awful things every day -- (laughter) -- and I will always defend their right to do so. (Applause.) [... ] The strongest weapon against hateful speech is not repression; it is more speech -- the voices of tolerance that rally against bigotry and blasphemy, and lift up the values of understanding and mutual respect. [... ] On this we must agree: There is no speech that justifies mindless violence. (Applause.) There are no words that excuse the killing of innocents. There's no video that justifies an attack on an embassy. There's no slander that provides an excuse for people to burn a restaurant in Lebanon, or destroy a school in Tunis, or cause death and destruction in Pakistan.

see “Nazi”
" Latest college shenanigans by the Regressive Left: censorship at Pomona and UCLA; Wellesley student paper publishes “we need free speech but...” editorial https://whyevolutionistrue.wordpress.com/2017/04/21/latest-news-about-college-shenanigans-by-the-regressive-left-censorship-at-pomona-and-ucla-wellesley-student-paper-writes-we-need-free-speech-but-article/" April 21, 2017

Anarchism & American Traditions (1908)
Context: What has Anarchism to say to all this, this bankruptcy of republicanism, this modern empire that has grown up on the ruins of our early freedom? We say this, that the sin our fathers sinned was that they did not trust liberty wholly. They thought it possible to compromise between liberty and government, believing the latter to be "a necessary evil," and the moment the compromise was made, the whole misbegotten monster of our present tyranny began to grow. Instruments which are set up to safeguard rights become the very whip with which the free are struck.
Anarchism says, Make no laws whatever concerning speech, and speech will be free; so soon as you make a declaration on paper that speech shall be free, you will have a hundred lawyers proving that "freedom does not mean abuse, nor liberty license"; and they will define and define freedom out of existence. Let the guarantee of free speech be in every man's determination to use it, and we shall have no need of paper declarations. On the other hand, so long as the people do not care to exercise their freedom, those who wish to tyrannize will do so; for tyrants are active and ardent, and will devote themselves in the name of any number of gods, religious and otherwise, to put shackles upon sleeping men.