You still don't understand (or don't want to understand), China was always seen by US as a balancing factor against erstwhile USSR, so no US intervention then, today China is trying to flex its loose muscles (pre-mature) and what US is doing (encircling China and proving who still is the real Boss) in south Asia (including construction of new naval bases) is no secret. If things get ugly, it will be China which will be on a losing side with allies such as beggar-terror epitome defunct pakistan and North Korea, and no-one else.
As I had said everything falls in place when the time is ripe, nothing happens before schedule, you can go on with your argument that no one is opposing Tibet occupation "today", however, can you guarantee that your rival nations with the type of (Tibetan) assets they possess can never cause China any threat? If yes, then you need to read a lot and update your shallow knowledge. If No, then you are fine.
P.S: You have uselessly argued on the thread " Nehru refused UNSC membership" without any prior research on the topic, on which you were proved incorect, please don't continue with your arguments based on CCP propaganda.