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i had a mate working in China-he grew up in Hong Kong so actually speaks decent Chinese-he was shocked how racist the Chinese were to him thinking that he couldn't understand them. Apparently one of the favourites is to call Westerners 'stupid pink pig' while smiling and pretending to say hello. Think they were bemused when they got told to fuck themselves.
Calling white people Dave is just taking it too far though.
My mate got called Dave once by a group of Asian lads "alright then Dave, on your way Dave, see you later Dave" , I thought it was as hilarious as they did (especially as I wasn't even with one of my many white friends called Dave) but it does kinda point out the difference in language and privilege related to it around this part (and it's related colonial parts) of the world.