"...Before all that politically motivated expansion
and toughening of Shariah, though, the Quran
told early Muslims, who routinely faced the
mockery of their faith by pagans: "God has told
you in the Book that when you hear God's
revelations disbelieved in and mocked at, do
not sit with them until they enter into some
other discourse; surely then you would be like
them."
Just "do not sit with them" — that is the
response the Quran suggests for mockery. Not
violence. Not even censorship..."
http://mobile.nytimes.com/2015/01/14/opinion/islams-problem-with-blasphemy.html