Dude, check your flaky arguments. It seems to me you still have a lot of rice grains to eat. Do you have a map? Can't you see how far China is from Spratly islands compared to the rest of Southeast Asia? Are you aware of the Principle of Effective Occupation or the term Inchoate Title? Vietnam, Philippines and Malaysia all have legitimate claims, proximity-wise and historically speaking. EEZ is 200 nmi from the shoreline, by the way. Go get a map and measure with a ruler. You don't need much.
Obviously, China's claim is born out of greed. You sure are aware of the territories it forcefully claimed, right? Macau, Hong Kong, Chinese Taipei... and who knows what else. I'm sorry but as an ASEAN citizen, I find your views so tinted with ignorance. Study IR first and you'll know which nation is nothing more but a greedy gremlin.
EEZ did NOT even exist until 1982. It said very clearly that all the islands with existing ownerships are not affected. It only applies to the islands nobody had ever claimed. China was the first one to claim these islands long before Philippines and Vietnam were even independent nations.
So what if it is farther from China?
What about Senkuka/Diaoyu islands? It is so much closer to China than it is to Japan. Why is the US backing Japan on this one?
Same goes for Falkland war. Why did the US back UK?
Stop the double standard. It is all about supporting whoever is in the US's camp. And oppose whoever the US has put on the enemy list regardless the circumstances.
The bottom line is, when Spain signed treaty to give Philippines to the US, it never included Spartly islands since it was outside its boundary. When the US let Philippines become independence, it never included Spartly islands on its map.
Your other arguments are totally BS.
Macau? Hong Kong? Taiwan?
Have you actually looked at the map? Macau and Hong Kong are both IN China. They were taken by European colonists at gunpoint, and now they have returned to China by the treaty. It's like if I grab your living room at gunpoint, then returned it to you 99 years later, but afterward I kept saying it is an example of YOUR land grabbing. How silly would that be????
Taiwan? Google Taiwan, and lets see what's the official name of Taiwan, as well as its history.
Taiwan's official name is Republic of China. Guess what? The regime (an US ally) on Taiwan used to rule all of China including Taiwan, but after they lost the civil war in 1949 to the communists, Taiwan became their final stronghold. Taiwan has always been a part of China until Japan illegally grabbed it during the First Sino-Japanese war in 1895, then returned it to Republic of China in 1945 when Japan was defeated in WWII.