I'm really not convinced that thug isn't used for the relevant sort of white individuals in the US
This BBC article refers to Obama using it and being criticised for it.
www.bbc.co.uk/news/world-us-canada-32538487
It includes the unhelpful comment
Activists and cultural critics have pointed out the term is often used to refer to black Americans, and white Americans doing similar things would not be labelled the same way
Unhelpful because what othercword would be used? I can't think of one.
The objections seem to arise from the use to describe rioters in Baltimore in 2015. The (must say to me entirely spurious grounds) being that the rioters had every right to be angry and that criticising them for the pointless destruction of buildings in their own community was questioning that right.
If you ask a British person what picture springs instantly to mind when they hear the word "thug" the picture will be classic low foreheaded , pasty /spotty skinned, knuckle dragging, probably over - muscled and white. I very much doubt that for a white British person the image called up would be a black man.
I think that a white British perdon if reading an article about a violent, aggressive criminal accompanied by a picture of a black man would think "thug" - but they would do the same if photo was a white or Asian man.