#blacklivesmatter racism is a human problem

I'm no anthropologist, but I suspect it has an inherent human element. Humans are tribal creatures, and I think there's an inate tendency to see those in the tribe as good and to fear those from outside the tribe. The difference is that in white European cultures it tends to have become institutionalised, and European countries have historically used their greater levels of technology after the Industrial Revolution to give full rein to their views on racial superiority.

Definitely a human problem. You can find racism everywhere. One area I have a little personal knowledge is the level of racism between tribes in Nigeria and Ghana. I really do believe that you will find racism everywhere. I think @hats has given us some examples from China also.

If that was true it would mean there is something unique about white Europeans, some kind of exceptionalism?

Nah - it's everyone's problem. You can't make it one groups problem because then the impetus is on them to fix it. White supremacists aren't going to end white supremacy on their own - everyone has to join together otherwise nothing is going to happen.

You also have the issue of one groups solution probably not being accepted as the end by any other group. For example the British slave-trade past; if we leave it up to the rich people whose inherited wealth comes from the British slave trade, they will probably think job done on fixing past wrongs when they move a few token statues into a museum somewhere & put up a plaque saying they were a few bad apples of the time. When that's probably not going to be job done for anyone else.

It's a human problem which is why racism is also widespread in many places without substantial white populations.

What makes white racism such a big problem are the huge structural inequalities in favour of white people in so much of the world. The inequalities in material wealth, physical safety and opportunity are vast.

That and the extra perilous situation it puts black people in beyond the discrimination that all non whites suffer.