Why do atrocities in WW2 majorly occur in asian theaters but not in europe?

It is hard to understand what you are asking because all the double negatives but Asians especially Japanese which invaded China in 1937 has a great value of honor, when America attacked Japan in the subways, rather than being captured the Japanese disemboweled themselves, they thought it was the ultimate honor to die in the most painful way than allow themselves to be captured. I think you need to research it more. Europe had a lot of atrocities too, anytime you are in DC check the holocaust museum man