https://www.google.com/maps/@42.1589047,24.785939,3a,75y,202...
You can compare to other areas of the city:
https://www.google.com/maps/@42.1589047,24.785939,3a,75y,202...
I think racial tension came down a lot the last 10 years, and the reason is that quite a few Roma work in Western Europe. For the ones in Stolipinovo I believe the prime destination is Dortmund. FWF I think the EU helped diffuse the tension by allowing increased mobility of both Roma and poor Bulgarians. I think the Roma neighbourhoods were much worse around the turn of the century and the politics were much more aggressive towards the Roma - I remember the Attack party being really popular back then.
I think it has been slow, but nowadays it is not as acceptable as once was to publish bluntly racist texts like this example from a prominent BG journalist in 2012:
https://translate.google.com/translate?sl=bg&tl=en&u=https:/...
In 2018, the same guy got a lifetime achievement award from the union of BG journalists.