OK, #openscience people. I'm expecting you to step up and explain how this is racist so URMs don't feel threatened within our movement.
https://twitter.com/KirkegaardEmil/status/804483340900376576 …
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He wouldn't be allowed to attend any event that I help organise. And would be expelled from any space online that I help moderate.
This is why professional bodies exist for example to police who gets v to call themselves eg doctor or psychologist etc.
Which is technically what you propose by sayi you'd gatekeep and police him out.
I agree obviously. 
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