I'd like to add a psych perspective to the disturbing and disappointing behaviour of Shaun Beagley and the responses of those around him.
Context: london.eater.com/2018/7/13/1756…
First though, Mimi Aye (@meemalee) and others deserve a lot of respect for pushing on this. It's shown that when minority individuals stand up against racism they are perceived more negatively than when a white person does the same. So they have taken a risk in doing so.