Imagine for a second that you speak Chinese. You find yourself on a Chinese forum and a Chinese person explains that China is the country against which other countries measure themselves and this is why they are always attacking or criticising China.
You then ask this person if they speak anything other than Chinese, because you want to know if they're basing that opinion only on Chinese media.
But instead of answering the question, and perhaps acknowledging they live in a media bubble, they instead choose to repeatedly avoid answering it, then type out a very long and defensive rant with capital letters.