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 anyone is required to utter, write, film, broadcast, or publish whatever idiocy crosses his/her/their mind. Just because you can does not mean you should. The Constitution protects your right to be a moron. It does not force you to behave like one.
Those are your rights. My rights include the right to ignore you.
A right is not a substitute for using your brains. You are also permitted to think.