We had a German exchange student who thought it was weird that holocaust denial is not outlawed in the USA. She felt like we were falling down on the job. I tried to explain the idea behind the first amendment but she wasn’t convinced.

Nowadays it’s more complicated because people express, say, holocaust denial on private social media platforms then raise first amendment issues when that same platform decides that allowing such dreck on their platforms damages the brand, and so takes steps to eliminate it. Yet newspapers have ways been free to reject letters to the editor and op-eds.