Only about 10% of the population is descended from Chinese nationalists that arrived in 1949. The other 90% of the population doesn't want jack to do with China (nor, indeed, do many of the grandchildren of the nationalists, who have long since assimilated).
Genetics of the Taiwanese people is an absurdly spurious defense in this debate, I'd ask you to provide any sort of proof to your original claim that 'Taiwan does NOT want to “reunite” with the mainland.'
If you look at their history and policies it clearly does not feel the same way you do. There's a big wikipedia article that I linked there that says otherwise. Prove me wrong on this and I'll happily admit defeat.
I linked a wikipedia article that clearly states the history of the ROC, you linked a rambling conspiratorial HN comment from the exact person I was replying to.
Would you say the Republic of China does not claim dominion over what we in the west call mainland China? Yes or No? It's a very simple question that I doubt you will answer.
How about people in Taiwan do not want to have their free society and personal freedom destroyed by being taken over by communist China? Is that so hard to accept?