So my thoughts on it are that we back Taiwan as it seems its the popular thing ( amongst Taiwanese ) and coincides with our own US interests ( read-Natl Sec )
Well, this is what it comes down to, doesn't it? I just prefer to be clear-eyed about what we choose to do.
From the Mainland China perspective, it is completely natural to expect reunification at some point, and by force if necessary. And we can pretend that it's about a people's self-determination for us, but if Taiwan had no US national security implication then, at best (or worst), it would be a Ukranian situation, with support from afar (meaning we wouldn't risk losing 3 carriers, many hundreds of warplanes and who knows how many US deaths).
In my mind, there's not a right or wrong about what the US should do. For myself, I want the US to retreat a bit from being the world police absent a clear and present danger to core US interests, or a clear mandate from a goodly portion of the rest of the world. I understand other Americans having a different view, but I'd expect that view to be applied consistently to other parts of the world.