Sure, the US has their bases there (many since WW2), but we can't blame the US alone when we also have China making threats and claims that scare the heck out of other countries. The US doesn't need to move a finger to have Taiwan or Philippines on their side... these countries know what they're up against and will, for obvious reasons, want to have a "big guy" on their side.
In a few years China will not only have US bases around them, but also a handful of countries that won't side with them on anything. And that's how the next version of the "Pacific NATO" will be created... the US will of course take advantage of it, but it could not exist without a China that makes overreaching claims, threats, and their huge military.