This whole matter is repulsive - it is antithetical to my sense of our system of freedom of expression and equality of treatment before the law.
Labels should never be used to deny anyone's speech freedom. Period.
Everyone, including so-called "terrorist" organizations, are entitled to speak. Our "system" works best when everyone can say what they wish and responsible people from government and outside government respond.
And everyone, including "terrorists", are entitled to a presumption of innocence. We cannot pre-convict people by applying labels that try to make us think it's ok to do so. Calling someone a terrorist does not make that person so until or unless she/he is properly convicted of committing a crime under the laws of the United States or its states and local governments.