A short excerpt from his speech to the UN. Full video found here
http://www.youtube.com/watch?v=-GqYCKV2wzA
"The answer is enshrined in our laws. Our Constitution protects the right to practice free speech…. Americans have fought and died around the globe to protect the right of all people to express their views—even views that we profoundly disagree with. We do so not because we support hateful speech, but because our founders understood that without such protections, the capacity of each individual to express their own views and practice their own faith may be threatened.
We do so because in a diverse society, efforts to restrict speech can quickly become a tool to silence critics and oppress minorities. We do so because, given the power of faith in our lives, and the passion that religious differences can inflame, 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.
I know that not all countries in this body share this particular understanding of the protection of free speech. We recognize that. But in 2012, at a time when anyone with a cell phone can spread offensive views around the world with the click of a button, the notion that we can control the flow of information is obsolete."
Read more
http://www.newyorker.com/online/blogs/johncassidy/2012/09/obamas-defence-of-free-speech-was-it-utopian.html#ixzz27j4mDg7X 