My theory is that they are just envious. Korean are richer than them, they are whiter, etc...
Any group, that insults another group or individual, is attempting to place themselves on a higher level than their target.
By placing themselves in an exalted position where they feel that they can pronounce Judgements on others, they feel that they have elevated themselves to a social position, way above their targets.
Which, of course is not true.
It's only in their mind.
And the real basis of their actions, is for reasons, that they feel so inferior.
I am part filipina and I have never heard of any filipino insult koreans?
What kind of question is this?