I don't think Vietnam will agree with your statement. In the last Sino-Vietnamese war, China did have an opportunity to demonstrate its abilities and only those with a naturalistic bias would share your views.
In any case, your comments are somewhat inflammatory.
Inflammatory or not, it is a fact. You like it or not, the USA can push her neighbors around; Russia can push Eastern Europe around; so what is wrong with a statement that the stronger can push the weaker around? that is a fact of life, deal with it.
I don't know how you can make your claim. China actually did quite well in the last Sino-Vietnamese, how would you judge otherwise?
Granted the strategic goal was not fully achieved; but:
1) demonstration that the USSR could not and is mentally unwilling to back her ally with a defense agreement; China mobilized 1.5 million troops along the border with the soviet union; and 20 million reserves were put on alert; and the invasion of Vietnam was done with second line troops so first line troops can be deployed against the soviet union, to deter a soviet intervention. The soviet union did not fulfill her treaty obligations to Vietnam.
2) set back and reset the Vietnamese economy so that Vietnam will not be competitive globally for a very long time; China implemented a scorched earth policy to reduce the industrial heartland in northern Vietnam that were not previously destroyed by B52s.
3) to force Vietnam to back away from Cambodia - which China failed.
The losses were also in favor of the Chinese army, even if you choose to believe the Vietnamese numbers; and the invasion force is comparatively small, it is smaller than the 6th army at Stalingrad, 200K men, with a 400K reserve.
So what China demonstrated is:
1) China have the will to go to war, even if it means it would be against a super power
2) China know how not to get dragged into a slow war (think Afghanistan, Iraq) that is just a drain on the economy
So how do you think that Vietnam would not agree with these statements? the land border issues between Vietnam and China were settled immediately after the collapse of the soviet union; why would Vietnam do so if it does not fear another beating from China?