From a reader and the head of Federalist Society chapter:

I think it’s time for an important lesson in the First Amendment, courtesy of Justice Breyer:
You may burn flags, Constitutions and Bibles.
You may make movies depicting the assassination of the President of the United States.
You may even crush the heads of kittens with stiletto shoes.
You may NOT burn Korans or depict the Prophet Mohammed in a bear suit.
That will be the extent of our First Amendment lesson today.