Exactly. This is one of the things I meant by saying non-white people have multiple criteria to juggle. Do I want to live in a nation where racial tolerance is achieved via isolation or one where I might be called names (which has occurred in the USA as well) and might even face violence, but get richer opportunities for cultural and social interaction? Note also that this question is different for a non-white person in the USA considering immigration to Europe than it is for an African refugee.
My admittedly small point is that just as white Americans can discount racism because it does not apply to them, non-white Americans can weight racism (in the West), rather than treating it as a binary switch ("litmus test"), because it always applies to them.
And then, of course, London has real Indian food.
—ravi