The first amendment says you can say, write, or publish whatever you want without fear of being arrested, shot, imprisoned, or otherwise legally penalized. On television, the internet, as film or in print. From your mouth or on your blog, even if what you are saying is incredibly stupid, baseless, and factually incorrect. Even if it offends everyone who reads or hears it. As an American, being a loudmouthed jerk is constitutionally protected.
However. The first amendment does not say you are required to utter, write, film, broadcast, or publish whatever idiocy crosses your mind. Just because you can does not mean you should. The Constitution protects your right to be a moron. It does not mandate you actually behave like one.
Those are your rights. My rights include the right to ignore you.
A right is no substitute for using your brains.