I think you might have a grandiose mental image of America’s past. The 1798 Sedition Act ‘made it a crime to publish "false, scandalous, and malicious writing" against the government or its officials’[0]. A congressman went to jail for speaking critically against President John Adams. President Nixon tried to suppress the 1960s cultural revolutions. The US has always had a bit more of an authoritative twist than the American History books write.
[0] https://en.wikipedia.org/wiki/John_Adams#Alien_and_Sedition_...