But to such a government it doesn’t matter anyway. They will do whatever the fuck they want. They will introduce new laws if they feel like it.
They need to entirely trash the constitution and effectively dissolve the US republic first. Maybe they're heading that way, but it is a barrier, and the lack of ambiguity of
Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the government for a redress of grievances.
is the whole substance of that barrier. If you think an exception for hate speech isn't something that can be abused, look at all the countries right now criminalizing protest of the Palestinian genocide using it as legal justification. Think about the entire situation that is prompting these killings; we have clear legal rights to peaceful protest, and people are exercising those rights, for which they aren't arrested and charged with speech crimes but killed outright in profound contempt for the law, because they don't have a legal process to silence them, just the ability to kill people. This is exactly when we need free speech the most, and it makes very little sense to fantasize about removing it so you can silence others when you are the one whose speech is in dire need of protecting right now.