In the US if you make a social media post threatening the president you are breaking the law and can be sent to jail just as much as if you said it

These are both true statements, but there's a huge difference in scale.

The UK arrests 12,000 people per year for social media posts ( https://freedomhouse.org/country/united-kingdom/freedom-net/... ), for a broad range of vague reasons including causing offense. That's far more than much larger totalitarian nations like Russia and China.

The US arrests folks for direct online threats of violence - a much higher bar.

Link?