Not really, ethnic gangs only terrorise their own kind. In Toronto, the Tamil gangs prey on the Indian community, very famous gang called themselves Kanan-47, but outside of the indian community, they're hardly even felt. Same thing with the Vietnamese or Chinese tongs. The most sought after turf is the drug distribution netowork and in the Great Lakes Region, the biker gangs ride on top with ties to the front-line street gangs to do the street work. Organised crime keep a low profile, just collect the cash and want as little trouble as possible. Not like those 369 gangs in Sg, stab school boy over staring incidnet and claim to be "terror." The Italian mafia, their grandchildren now have law degrees and have legitimized their trades. Construction, abbatoirs, and waste collection are their main businesses now.
Cheers!