Based on watching movies and TV, you get the idea that criminal gangs in urban neighborhoods tend to align by ethnicity, and that they all seem to stick to a handful of activities and “products,” for lack of a better choice of words.
Black, Latino Youth: Drugs, guns, sometimes prostitution.
White Youth: Drugs, guns, right-wing hatred.
Italian Mafia: Gambling, protection, unions.
Chinese: Gambling, counterfeit currency, counterfeit and contraband consumer goods.
Armenian: Prostitution, human trafficking, sometimes guns or counterfeit currency.
Russian: Prostitution, human trafficking, sometimes weapons.
…and so on.
Is this a Hollywood invention, or do urban gangs really try to stick to their own “brands,” so to speak?