Blocking construction of Chick-fil-a restaurants over Cathy's views is a violation of Cathy's First Amendment rights. Boston and Chicago have no more right to stop construction of Chick-fil-As based on an executive's anti-gay views than New York City would have had the right to block construction of an Islamic community center blocks away from Ground Zero. The government blocking a business from opening based on the owner's political views is a clear threat to everyone's freedom of speech--being unpopular doesn't mean you don't have rights. It's only by protecting the rights of those whose views we find odious that we can hope to secure them for ourselves.
A principled stance. Via In Defense of Chick-Fil-A | Mother Jones.