As a scientist from a minority I would say that I found no barriers in science, except for merit. Talking about today’s science of course, no 19th century one.

I can accept that maybe there are still some barriers in some situations I am not aware of, but then the message should not be “more blacks in science” or “more women in science”.

That’s countereffective and humiliating for minority people: the focus should be on the barriers, if any, not on the headcount. We are not pandas in need of protection.