that's coz stinky chinks open up their pussies for ang moh kias.
viets not direct competitors to stinky chink pussies.
viets serve low SES stinky cheena ah bengs and ah peks.
stinky chinks serve ang moh kias.
whereas ceca virus directly compete with lowly stinkypura peasants and coolies and steal their jobs.
not for no reason stinkies are known as coolie genes and looked down upon in all of East Asia. taiwanese going so far as to call stinkies "peesai" or nose boogers.