Your quote makes it clear that "to whom and what 1A applies" is up for interpretation. While the wording of 1A specifically only prevents congress from passing

Your quote makes it clear that "to whom and what 1A applies" is up for interpretation. While the wording of 1A specifically only prevents congress from passing laws that restrict freedom of speech, it has been extended by the courts to cover the entire federal government, and state governments in order to protect freedom of speech. There is no reason that in the future, 1A couldn't be extended further.