It all comes down to the fact that China is militarising those islands and the US cannot make China stop it.
US wants to control everyone through its power. But as other countries get stronger and more independent, it's ability to control everything diminishes.
Russia, China, Iran, North Korea are not prepared to bow down to American thuggery. These 4 countries will negotiate very strongly.
Countries like Japan, South Korea, India are prepared to worship the US as a god.
US elites wants control, when they see that control diminishing, they use their diminishing power.
Look at Donald Trump, US elites can't control him so he is considered a threat to the elites' world order.
It's all about control. China has reached a stage that it's comfortable in challenging American dominance. This is just the start.