Lazy.

The US believes the right of the individual to harass others based on their immutable characteristics is more important than the right of the individual to be free of harassment based on their immutable characteristics.

The UK doesn't, and that very much reflects UK vs US culture (US culture as we know being racist and divisive).

Meanwhile, the US seems to be flirting with a central idea of communism and fascism - that political criticism of the dear leader is off limits. Thus protecting the right of the (future) authoritarian (dictator) to be free of criticism.

I know which one of two actually reflects an important aspect of freedom of speech.

Rabble rousers will tell you otherwise, but the trick is to recognise they are rabble rousers.