It is my opinion that: 存在是有原因的,但不一定就是合理的。存在很可能只是暂时的. It wasn't even about the existence of CCP, Chinese communist party. Rather it is a general statement. Ironically, it is true that the existence of CCP will be temporary.
I can give you an example about how illogic 存在就是合理 really is. If someone decided to murder you and succeed, if 存在就是合理 is true, then following conclusions must be true: 1) murder is 合理, 2) murder you is 合理, because the situation has come into existence. Tell me, do you think either is true?
About your comments over my opinion, if you disagree, then explain your opinion about "TG存在的合理性" . "是个笑话" hardly qualifies as an idea or opinion. If you are interested on personal attack as you keep questioning me about my nationality, tell me why that matters, I might tell you the answer.