hmm.....this is getting interesting and worrying. Well, if a Chinese citizen has been killed in this riot/protest then its more serious than i thought and thinks might get out of hand if Vietnamese authorities don't act to stop this. Its obvious that the authorities sanctioned/allowed the protests. However this might backfire on them if the people start claiming they are too soft on China, and the government starts cracking down harshly, it could even turn into a mini civil war where the people might want to topple the communist government which they see as being too close ideologically( they learn/adopt most of their policies from china) and economically to china. So the communist party should threat carefully on this. Other foreign powers(U.S of course) might also want to use this opportunity to influence/stir trouble so the communist government could be topple and replaced with a more democratic leader/party which will be more close and subservient to the U.S(the way the Philippines is) which i don't think is a bad thing.
. It will be perfect of the U.S can have a ally/democratic regime in Vietnam this will all but complete the U.S posture against China, and also enable the U.S to reduce Russian influence in Vietnam. SO the U.S will basically kill 2 bird with one stone(like in Ukraine).
As for Vietnam, its in a difficult position, it cant really afford to get too close to the U.S as it will antagonize Russia. Vietnam can't also expect to have Russia support on this issue, since China and Russia have more close ties and share similar world issues/interests. So Russia wont take a stand with Vietnam on this. So Vietnam is in a very tight situation/almost isolated, unlike its ASEAN peers, Its a communist authoritarian country like its northern neighbor and also has large territorial claims with other claimant in the SCS. Vietnam government should calm down and think very carefully its position/role in the region. It will have to either remain communist with Russia as a partner/patron(while knowing Russia wont support it in its dispute with China) or be more reasonable and ally with the U.S(though i admit this will mean loosing its sovereignty and becoming almost a puppet like the Philippines) but this is the best situation i see, since there's no way Vietnam can expect to win any Naval battle against even against Taiwan, Malaysia, Singapore(forget about China). so Vietnam has to forget Russia and ally with the U.S, its the only solution if it wants to keep at least most of its maritime territory.
Anyway will be interesting to see how things play out.
on another note, why are Indians on here cheering Vietnam to keep burning Taiwanese, hongkong and Chinese mainland shops?
strange to see some people encouraging their neighbor to burn/harm its own house. This is not a good image for Vietnam IMO. so you should be advising/hoping for calm to prevail, except you wish to see Vietnam have a bad image.