90's was a tough time for any Asian, but the East End was notorious for racist scumbags such as the NF and BNP (who have now moved to places like Essex and surrounding areas) and that's what fuelled everything. You rarely hear about Bangladeshi gang crime because there's no threat, the whole borough is literally mini Bangladesh, everyone is Bengali. Don't want to sound big headed but it was the Bangladeshis who started off this Asian gang malarky and all this "massive" has now gone spiralling up north. Everything that happened in Tower Hamlets is now happening up north, the same trend, same short back and side with the mullet, jewellery, rented cars, etc. Most of the Bangladeshis and Asians in general are going into more serious things, Cocaine and Heroine and staying "low-key" seems to be the fashion now and this street culture while still there, not that prevalent. Also, a lot of Bangladeshi gang members (loosely use the word 'gang' I would say more street thugs) are either part of Islamic groups or opening up youth centres.
Forgot to add the EDL have tried to come in to the area but were unsuccessful.
The Somalis and Tamils are meant to be a crazy bunch but I don't know much about them.