The West has never conquered China. China is a thousands year old civilization. Chinese look down on Westerners as barbarians, people who live in the north where there is no sunlight in winter and go mad from lack of sunlight.
Even we call anyone who is not East of indus and on our side of himalaya as a melachhas ( literally barbarians ) .
And we used to look down upon turkic muslim invaders , Arab Muslim invaders, etcetera , we underestimated their lust for barabarism.
It didn't end well for us , yes we resisted for 1000 years , it includes britsh paramountacy era also.
We learnt one thing, never underestimate outsiders, looking down upon anyone is unnecessary and unrelated to what they might do to you .
Even you people had your moments with Mongols , with the 5 nation aalliance and Japanese .( I completely know what they did to china , and even though India and China or Bharat or zhongua are in a adverse situation relying on a very thin aspect of modus viviendi to manage current situations on borders , I still have my sympathies with Chinese and recognise their heroic resistance to japnese .
But did any one in Nanjing thought what japs would do once they won the city ? None did .
What happened after that , I don't wish to describe here , but Chinese looked down upon japs as wako or pirates , yet they just like us underestimated their cruelty.)