Vietnamese are nigger tier asians: poor, uneducated, rude, loud AF. He probably sees them as his people. A lot of asian men have self hatred for themselves and a hatred for whitey. Usually boils down to mommy issues and the fact that asian women prefer white men. Combine them together and you get neurotic cucks like this guy that will do anything to "hurt" white men. Including siding with the same people that would one punch him.