Actually it is to some extent. It's happening in many parts of London, but on a basis of geographical gangs rather than culturally based gangs. I'd be amazed if there aren't any largely Bengali gangs in East London who have been involved. However it isn't a question of the race of the victims (nor is it in the originally mentioned case, where not all the victims were white).
That's a reasonable and interesting bit of info, thank you. I don't really want to row with you, especially as we actually knew each other a little bit as teenagers (you may be surprised to know: Andy Martin-Foulden Road-LMC scene.)