Well I hate to sound cold blooded, but if you look at polls, less than 5% of Taiwanese support unification. Also, most Taiwanese consider themselves not only different from Mainlanders, but also superior culturally and politically, leading to a sub-racial cleavage characterized by malign us the “civilized” Taiwanese hating them the “rude, stupid, poor, and barbaric” Chinese others. They are pretty much similar to the HK blackshirts in 2019 (HK/Taiwanese supremacists in relation to Mainlanders). Such construction of nativist Taiwanese identity was the result of a combination of Japanese colonialism, Chiang’s dictatorship (White Terror), and US influence.
Now, for the CCP, the Party’s legitimacy lies in getting China’s land (lost since 1895) back and unify with the CHINESE (mostly conservative KMT Chinese nationalists, or other right-wing Confucian nationalists folks like me) population in the Island. For the rests who consider themselves as distinctively Taiwanese or Formosan, well, it is not the PLA’s mission to protect a staunchly hostile population standing in the line of fire. Nor was the US military’s mission to protect pro-communist Vietnamese civilians (or pro-Saddam Iraqis). Collateral damages are unavoidable in wars, and if you care too much about moral goodness and focus too much on avoiding civilian casualties, haha, your enemy will surely take advantage of your kindness. War is about achieving your political objectives by turning your opponents into piles of blood and guts, not trying to become Mother Theresa. This is also why I believe any military action in this context must absolutely be the last resort.