Isn't gang culture also a result of poverty?

There is even a german gang culture, or there was one before the more violent gang cultures of people from war zones drove the german gangs away due to their more violent nature. At least partially as our western gang culture returned in the form of also very violent motorcycle clubs which own sex slaves and throw hand grenades at bars of competing clubs. So even the ultra violence is not exclusive to some races or cultures, just read up on what the Banditos and the other motorcycle gangs do in their free time. There is even a dutch gang that has begun expanding in Germany now:

https://en.wikipedia.org/wiki/Satudarah

This is western gang culture plain and simple. We even managed to make it somewhat middle class worthy and they probably have more lawyers as well to avoid getting punished or stopped.