By “most countries” I’m pretty sure you mean “the United States”, and your constitutional right does not protect you from civil slander or libel cases.
It doesn’t need to be an international organisation headquartered in the vatican city. It could be equivalent to your local knitting club. If you say mean things about an organisation you can expect them to take legal action to stop you.
They could try to get cease and desist all they want, there’s a constitutional right in most countries that protects such speech.
By “most countries” I’m pretty sure you mean “the United States”, and your constitutional right does not protect you from civil slander or libel cases.
Most countries don’t have a “the church”
If there’s “a” church then there’s “the” church.
It doesn’t need to be an international organisation headquartered in the vatican city. It could be equivalent to your local knitting club. If you say mean things about an organisation you can expect them to take legal action to stop you.