China is welcome to squash Taiwan as we wont really miss them.
Many people forget.
1. Taiwan was part of Japan during WW2, yip the Taiwanese fought against the Chinese.
2. When the Chinese civil war went South, 2 million Chinese imperial troops invaded Taiwan, mass murdering 200 000 native Taiwanese in the process who tried to defend themselves against this huge invading army.
3. The Taiwanese took most of the cultural valuables to Taiwan, locked in vaults in the mountain for many years, many crates has not even been opened yet.
4. They took China's entire Gold reserve with them.
So to Xi. You are welcome to invade. I will happily rubber stamp your invasion.
All that America is worried about is that Taiwan is a buffer to the Pacific. If Taiwan falls, the Chinese fleet can easily move into the Pacific. And that's a huge no no for them.