The swastika wasn't taken from bhuddism. It was a nordic symbol used in scandinavia to represent the sun. Doesn't that make more sense, given hitler's whole fascination with, you know, nords and shit :/
So you think it's more plausible that he just happens to have all these modifications that are similar to combine practices but actually aren't, and he hates the combine because... what, he heard some stuff, rather than he's had direct contact with the combine to give him a reason to hate them?