The US has the most expansive free speech laws in the entire world. Perhaps 'extremist' is a bit hyperbolic, but it's certainly true US free speech laws go far beyond any others.

Reporters Without Borders maintains a press freedom index. Their justification is detailed here: https://rsf.org/en/index

Canada ranks 19, the US 42

I’m sorry but this rating is a bit of a joke. It lists UK and France as having much freer press than the US.

I remember an interview with John Carreyrou, the French-American journalist who broke the Theranos scandal.

He said very clearly that if it had happened in France, no press outlet would have covered it.

Theranos had a board of trustees that included Henry Kissinger, a future secretary of defense, etc.

And the publisher of the, WSJ, Rupert Murdoch, had invested hundreds of millions.

I doubt it would have been published in the UK or Germany either.