I am always wary of over-simplistic views about complex situations, but I feel that he has a point, albeit one that can be seized on to make media capital, which is not helpful.
I think there is a problem with feckless men in the black and Asian communities, and that is a cultural aspect that needs to be addressed with appropriate education of young people.
The gang aspect is more complex - I believe it speaks to a need for structure and a sense of belonging that can be absent from the lives of poor youngsters from fractured backgrounds.
Young people need stability and a feeling of self-worth and identity, and this can often be absent in their immediate family, and found in the gang structure.
Gangs hinge on the exaggerated notion of 'respect' which is often underlined with fear and violence, but for some young people, that is the only social bonding they know and understand.
Like any social difficulty, it should be addressed by education at nursery age, but as I have banged on about ad infinitum on this site, nursery education is under-valued and under-funded, neglected by politicians because small children don't vote, so they don't matter.
Start addressing the issues there, and we have some hope moving forward, but it won't happen.