https://www.wired.com/story/china-taiwan-pentagon-drone-hellscape/
The US Defense Department’s grand strategy for protecting Taiwan from a massive Chinese military offensive involves flooding the zone with thousands of drones.
I'm not talking about who's 'rightful ruler' or not. The roc was a country and the communist revolution took a part of the territory and made it into the prc (a new country) while the roc still exist in the remaining territory. That's the definition of a secession. I was just pointing out one of the holes in your analogy.
Now that you took the time to write that I have a couple of questions. Was the white terror an ethnic cleansing? I might be under informed on the matter but I don't know anything about any ethnic groups targeted in particular. Your last paragraphs imply that the sovereignty and territorial questions about Taiwan and the People's Republic aren't a settled matter for the whole world (except maybe the prc). Are there many voices claiming for the Taiwan government to be the ruler of mainland China anymore? Or any territorial ambitions other than staying an independent island nation?
Chiang Kai-shek’s claim to a legitimate ROC government are tenuous at best. He basically used his position to launch a right wing coup against the unity government and attempted to purge it of all left wing elements. Claiming legitimacy when you’ve basically used force to try and take full control over a government is par for the course for fascism. That’s why I don’t believe the CPC demonizes the ROC prior to Chiang Kai-shek. They still holds Sun Yat-sen, a key founder of the ROC, in high regard.
Also, IIRC most of the dissidents in Taiwan were mostly people who lived there or who were indigenous to the Island prior to the KMTs arrival. As such, the white terror did involve suppression of a Taiwanese ethnic identity.