In my limited experience of just living in bad neighborhoods, most gangs I’ve encountered are just small groups of kids that sell drugs, rob, burglarize, fight, and occasionally kill kids in other small groups. From talking to older people that were in gangs (well, they still consider themselves to be in a gang, but the gang doesn’t functionally exist or do anything), things were much different in the 80s and 90s. Guessing it differs depending on the city though (there aren’t really “territories” in my city; drugs are sold through apps/text).

They seem to be trying to emulate Russia, Hungary, or even Nazi Germany. So probably similar things. The US tech oligarchs seem to want something like Dark Enlightenment, while the other politically powerful sect seems to want christo-fascism; all seem to be white nationalist to varying degrees.