Not only is our view of free speech different today, but the US has a long history of censoring minority groups. Take the Hays code for instance which made it de facto against the law for movies to portray gay men in a positive way or "race mixing" at all. That was around until nearly the 70s. That's still within living memory [1].
[1] https://en.m.wikipedia.org/wiki/Motion_Picture_Production_Co...