So what was it about Bloods and Crips that seemed "cool" to the rest of the country?

[Mowgli]

Some people like black destruction and others like to feel like men by comparing themselves to criminals

 

[FeloniousMonk]

Actually you mean-

 

[iFightSeagullsForBread]

Doesnt Chicago have a history of gangs that pre-dates Los Angeles?

Fun fact

Some Black Stones from Chicago moved to LA actually had a hand in crafting the Bloods to an extent.