Sexual abuse of children below the age of consent is historically (notwithstanding the last 15 years of paedophobia) "ignored". Each time it has come to the public eye in the last 100 years or so, it hasn't been because of police work, or even too often because of crusading journalism. Most often it's been because incidents have come to light that are so horrific, the media are forced to pay attention, and therefore the general public get to hear about it.
Like I said earlier in the thread, the systematic grooming and sexual abuse of children in care has been going on (and being reported on) for as long as I can remember, which is back to the early '70s. That wasn't "British Pakistanis". it was white care-workers and even social workers.