Is it though? Rotherham, the last time I looked, wasn't in North West England.
What is a more interesting question is why isn't it the leafy suburbs? Perhaps it's because the wealthy and powerful are above such things. Or perhaps there's another explanation...
Underlying all of this is assumptions. It's white working class girls who are the victims, and prowling gangs of Asian men the perpetrators. That feeds a very convenient agenda, and displaces attention from elsewhere.
Sadly I think this is far more prevalent than people think, and taking place in the corridors of the powerful and the wealthy far more than people credit. It's easy to see the blame lies with Asian men - most of whom are decent people who would not dream of abusing a child. But funny how, as I said earlier, there was no evidence of such behaviours in the corridors of Parliament. Or Buckingham Palace, apparently.
Isn't the real question not one of ethnicity or geography, but of power? As it always is.