There are a few reasons why people felt that we should accept large numbers of Hong Kong refugees...

1. They were British citizens until 1997,
2. They provide huge potential economic value,
3. They come from a very civilised and advanced society,
4. They are not religious nutters who treat women and gays as inferiors.

There is both a moral obligation and a socioeconomic incentive. Most people don't care about skin colour. They care about economics and social cohesion.