i get it, i have lived here for years and i side with taiwanese. but imo taiwanese peoples reason for looking down on chinese is less about politics and more about insecurity.
taiwanese like to point out how chinese people are rude and less cultured and uncouth compared to taiwanese. taiwanese people are happy to hear that i would rather live in taiwan than china(even though their favorite question is still when will i go back home). seems kind of childish.
the attitude is not as focused on politics IMO as you are making it out to be. i wish taiwanese would be more focused on being more anti chinese politically. if this country goes under mainland control we know its going to be a result of being sold out by korea fish or some bullshit like that as a result of people not being vigilante enough.