[systemvoltage]

> I think the main difference is that the chinese would not dare to dock their aircraft carrier in new york, while the US did so to provoke the chinese communust party in hong kong.

This is a tiring argument. China has only 1 ally - North Korea. The rest of the countries in the proximity of China are adversarial and aligned with US - Japan, SK particularly. If Canada and Mexico were close allies of China, you betchya there would be a lot more going on along the east and west coast of US.

In fact, Japan and SK are counting on US to defend them. Does Canada and Mexico have such relationship with China? No. Instead, the US+Canada have NORAD.

I suggest some reading regarding military alliances: https://en.wikipedia.org/wiki/List_of_military_alliances