You should understand war is not good for everyone, especially for vn in this case against China.
If you want a conflict, you will have one.
At the end of day, China will still grow around 10%, just like those years between 1979 and 1992, while vn exhausted its own resources to be against China. At the end, vn's president and premier minister came to Beijing and begged China to normalize the relationship. While during those years vn busy with schemes against China, vn's economy growed like a turtle's walk.
You want that part of history to happen again? You get what you call for.
As for as China's claim, those part of islands are part of China historically and Chinese fishermen fish there year after year. Even after WWII, documents have shown those area are part of Republic of China, thus part of PRC after PRC establishes her own U.N. presence.