https://www.city-journal.org/html/liberals-versus-political-speech-14330.html
Democrats control effectively most media in the US and most all social media and "fact checking" are strongly left leaning at best. Still they cannot convince well over half the country that their policies and beliefs are valid. So they consider it a constitutional requirement to legislate against any views that are counter to theirs. This requires them to interpret any dissent to their policies or criticism of one of their members as terroristic and subversive. They already consider protections in the Bill of Rights to be relative, not strict, and only applying to things and person's they agree with. This is something one with expects in a third world dictatorship or theocratic police state.