There's nothing about it in the guidelines: https://news.ycombinator.com/newsguidelines.html Anyway, this is noted and I won't do it again for the sake of civility, but the the claims made by the poster are so absurd I would have no problem saying it in a face-to-face conversation.
Yes. The links you've posted have nothing to do with China and are irrelevant to the conversation. "The US and Britain have done bad things, so China can do them too" yet again.
You said my claims were false. I say these links are relevant because the US and Britain have set a precedent with respect to the unilateral appropriation of territory and therefore have no leg to stand on when they criticize China for building islands in the South China Sea. If you can't understand that, you should seek professional help.