I would say that the “bad part of town” usually has overlap with the poorer part of town, regardless of what skin colour people have there. Of course, especially in the US, there’s significant overlap between economic status and skin colour. I just hate how the typical American view on “race” is projected onto other countries.

Americans typically have this hang-up on “race” that you really don’t find anywhere else. A lot of places you have talk about “ethnicity” or similar, but the American fascination with categorising people by their skin colour and then using that to make generalisations is pretty unique.