The huge difference is Triton Island is in PARACEL, not SPRATLY.
Triton is very close to Danang, Vietnam ( the famous naval deep water ports ) and Hainan, the home of PRC submarine fleet and future CV fleet.
Triton is very far, far away from Philippines.
This humiliation is happening in PARACEL not in SPRATLY.
If we are honest, then we all will admit -- this is not about FON.
It has never been about FON, because Nobody is obstructing FON in South China sea.
This is all about HEGEMONIC right to humiliate and destroy everybody on Earth. The Mightiest force on Earth has humiliate Vietnam and PRC. Taiwan is PRC.
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1) What if, ... ... the next Spit--in--your--Face humiliation is done by Japanese warship citing FON too ?
2) What if, ... ... the next Spit--in--your--Face humiliation is done by Indian warship citing FON too ?
3) What if, ... ... the next Spit--in--your--Face humiliation is done by Australian warship citing FON too ?
If MIGHT is not RIGHT, and ... ...
In order to be JUST and EQUAL to every nation, PRC strategy MUST let all the other nations sail through inside PRC 12 nautical miles of the not so SACRED sovereignty as well. --- Right ??
Yes, yes, yes, yes ... ...
You are weak, then you must.
Peaceful strategy to all weaker nations.
You need to chill out a little.
It doesn't matter if a Japanese, Indian or Australian ship wants to conduct an FoN. They know there will be consequences and pushback from China if they do so.
Furthermore, don't get too emotional calling it a "humiliation". At the end of the day China is still the one building and solidifying its presence in the SCS, enhancing its naval capabilities by the largest amount per year in the region, and there's nothing anyone else including the US can do to stop them unless they're willing to start a war.
If all China has to deal with is a few US warships sailing within 12nmi of an island now and then, who cares.
Btw, for the US it is about "FoN" because they are talking about military "FoN" rather than civilian FoN. No one is obstructing civilian FoN in the SCS, but the US has been consistently historically adamant in regards to its self perceived right in deploying military vessels around the globe in an unimpeded manner -- this isn't anything new.