You're free to say what you want. Right?
You have your First Amendment rights, don't you?
Watch this important video, and you might have second thoughts. Think about some of the police officers who are expressing their personal opinions of groups like Black Lives Matter. Think about some of the bloggers you know and the nameless cowards who are so often flaming them (without accepting responsibility for their words).
Even think about Donald Trump's "locker room" talk.
Watch this short talk by Kimberley Strassel, political affairs columnist for the Wall Street Journal. You might even want to read her book, The Intimidation Game - How the Left Is Silencing Free Speech.