I could not disagree harder. I know a decent number of Taiwanese people and their hatred of communists is like my ex-Soviet friends: very very deep

I know many who work in the mainland. I don't really think there is going to be a war though, maybe a super short one. It is mostly the consequences that puts CCP on check. But maybe in a few years they won't care anymore.

Taiwan is mostly the descendants of refugees from the 1949 Communist takeover!

No, most are descended from Taiwanese who were there before the mainlanders arrived.