I doubt they think that. You’re being ridiculous. Taiwan is de facto independent, and there is some push over there to declare independence officially. The ROC is of a different era at the end of the day.
The USA doesn’t officially recognize the ROC but it is US law that consular, travel and business relations between them. Nancy Pelosi travelled to Tawain only a couple years ago.
Anyway, the rights for all people to self-govern themselves should come first over all that.
Dems started pre-blaming black men a couple days ago so who knows.