The United States needs dissenting opinions to function as a democracy. I don't care one iota what other countries do in that situation.

If we start seriously saying "but it's okay for China to do it, why not us!" we've already reached terminal velocity sliding on that slope.

Most if not all European ones will, in fact. First, they wouldn't even know you were "yelling" that on Facebook, second, the border guards who can barely be bothered to make sure your photo matches your face definitely won't care either.

They're not insecure about themselves, as societies, the way America seems to be lately. So sensitive!

Assuming you agree that this would be a valid reason to deny a visa to the US, are you able to provide examples of other phrases that should get you denied entry to the US?

And phrases that might be critical of the President, but not enough to deny entry?

I'm curious to know where you see the line between acceptable and unacceptable...

Any European country will

You can say that about the UK Prime Minister and still get entry.

Not all countries have a president.

Ireland