Why is the US vowing to protect Taiwan when they won't protect Ukraine?
I have read on the news that the US military and the President have vowed to protect Taiwan if China invades the de facto independent, sovereign nation.
China arguably has a stronger claim to Taiwan than Russia does to Ukraine. Unlike Ukraine, Taiwan still calls itself China: its official name is the Republic of China. There is no ethnic Taiwanese population in the way that there is an ethnic Ukrainian population or a Taiwanese language (they speak Mandarin in China). Taiwan is more ethnically Chinese (97% Han Chinese/Taiwanese) than mainland China (92% Han Chinese).
Why is the US military and government vowing to protect Taiwan when they won't protect Ukraine? Is there an alliance Taiwan is part of that provides insurance from other countries in the event of an external invasion like NATO that Ukraine is not part of anything similar that would give it American protection?
I am not arguing that it is okay for China to invade Taiwan for these reasons. I think such an invasion would be devastating for world peace and the world order of respecting sovereign boundaries which is under attack by Russian imperialism in Ukraine and has the potential of being further attacked by Chinese imperialism.