He is correct. We do have the capability to turn your country into barren land and wipe out all Vietnamese civilization but you do not have the capability to do that to us. Fact is fact. Put your ego aside and face the fact. Until you demonstrate you have the capabilities to destroy us, then you are in no position to talk tough. Only USA and Russia can do that to us.
All Viet Nam need are couple of nuclear weapons enough to check China aggression.