Facts and legality is also backed by power, not ethics. Yes, it is fact, but the US also absolves itself from illegally invading Iraq because they make the rules. So many here say facts because it legitimises questionable practices behind that may get criticised.

If China convinces most dictator driven African countries to support that Taiwan is part of China, will you accept it as fact if over 50% agree to it? If China was the one in power, will you accept their legal definition of who is a terrorist? I don't think anyone is good, just that nobody wants to admit their side is evil too.