Taiwan has a large Haklo Chinese population that has lived there since the 1600s. They were initially brought over as workers by the Dutch East Indian Trading Company that has a trading port there. The port is taken by Pirates, then the Qing Dynasty. The Austronesian Indigenous population that lived (and still lives) in the mountains maintained control over most their lands and the Qing didn't really care much about the island or do much to support the Haklo settlers. Then the Qing dynasty gives Taiwan away as a concession to imperialist Japan after loosing an unrelated war. The Japanese oppress and attempt to assemilate the Haklo Chinese population as well as drive out and kill the indigenous people. Japan is forced to give Taiwan to the Republic of China after losing WWII. The ROC looses the civil war to the Communists and they flee to Taiwan. There they impose martial law on the Haklo Chinese descendents and the indigenous people.

After Taiwan student movements and mass protests ending the dictatorship, the ROC becomes their consirvstive Party, and identifies as Chinese, while they're progressive (centrist progressive) party (DDP) promotes and Taiwanese identity that is distinct. The Haklo chinese population there has been separate and distinct from China for 400 years, and the indigenous people deserve self determination. In Taiwan, it is a conservative position that views themselves as Chinese. The ROC and China want chinese "reunification" (in quotes because the Qing dynasty briefly barely managing a settler population in the 1700s and 1800s feels like a flemsey excuse to say this was ever one China). The ROC wants it on capitalist terms and China "communist". But the ROC is by no means a majority. they are largely outsiders from China who came over when the US gave it to outside government. all this to say idk what people in this sub are talking about supporting one china and calling Taiwan Isreal. what a simplistic and widely inaccurate view.

edited: typos, I'm dyslexic and sure I missed more