Spent some time in India, and my daughter got married there, sadly the Cast system is something that will never die, and was so prevalent in WW1 and WW1.
That sadly is the bigger racism issue in the world when the same nations can't even get along with themselves.
I can't remember the film I watched on a black American fighter Squadron who went through the same thing and weren't acccepted until they saved B17's from being shot down in WW2 a true story.
It saddens me greatly, afterall................... is their blood when spilt a different colour?