Indeed, whose standard are they to use? US based company operates a platform adhering to US laws, should they be required to respect less free areas of the world and abide by their rules?
Idk how it all works tbh but I respect and admire the American approach to free speech (I'm old enough to remember the left saying "I might not agree with what you say but I'll die to protect your right to say it", haven't heard that from any lefties in quite some time) and read something to the effect that Elon basically wanted what was legal in his home country to be acceptable on the website he operates in that country. That makes sense to me. Don't like it? Make your own platforms, right?