Problem is, modern law was created to supposedly ignore race, colour, creed, age, social background, family etc etc. But it fails abysmally to do that, hence the famous 'Most crimes are commited by Blacks' comment by the ex-head of MetPol.
Political Correctness once again comes around to bite the British on their arse. Since, now the Police are more inclined to 'Talk about it' than 'Deal with it'. Personally, I think step one is to land...hard.... on gangs that are breaking the law, I cannot believe they are ignorant that their actions are illegal, and it doesn't matter what bloody colour they are, if they are terrorising people, then nick 'em.
The reason the problem with gangs is growing is simple. It's because no-one is stopping them, and when anyone tries, the Police arrest them for it.