It's sad that all this has prompted my wife (who is black) to start a serious discussion with me about where we choose to raise the child we're looking at having in the next few years.
To be clear, I don't want to leave the UK - not yet at least (not while City are good) - but I can totally understand why what she's seeing makes her nervous. She's a doctor in the NHS, she was a Samaritans volunteer too. This is the indirect impact of a lot of the rhetoric we're seeing, immigrants who are net contributors start to question whether they really feel welcome. And the ones who are well-educated and highly skilled also tend to have far more mobility to just leave and go somewhere else.
The issue I have with going somewhere else is that it isn't clear to me there are a lot of obviously better options out there. The UK is far from perfect, but its situation isn't unique.