This has been widely known in much of the North for decades. Anywhere with heavy Pakistani populations knows this. Plenty of people knew about Rotherham and tried very hard to get intervention. These people were often called racist, dismissed It's par and not infrequently arrested if they tried to do something about it themself. It's partly religious. When you have a religion that teaches outsiders are less moral and classes people as either modest virgins or whores, you're laying the ground work for this. But it's heavily tied to Pakistan (and to a slightly lesser but still significant degree, India). Which is why it would be good if we could stop using the ill-fitting term "Asian" in this thread. We're not talking about Chinese communities or Malaysians.
Some facts:
1/ Pakistan until very recently required four male witnesses to the actual rape in order to prosecute. Just to prosecute! The judicial system is so stacked against women in Pakistan it's a wonder there are ever any convictions.
2/ In Pakistan, rape is frequently seen as an offense not against the victim, but on the honour of her male relatives. For example, a boy from one village raped a girl from another a few years ago in North Pakistan. The villages settled the matter by deciding the girl's brother would rape the first boy's sister to even things out. To them, this was JUSTICE. Because it was seen solely as the boy having been harmed by his sister being devalued. THIS is the mindset that is commonplace in Pakistan.
3/ Reported rapes in Pakistan are something like one fifth that of Britain. That's not because Pakistani men are one fifth as likely to commit rape as British men. It's because nobody bothers to report it. Rape is almost normalised in Pakistan.
These are all facts. It's is utterly logical to presume that when a large number of people immigrate from another country they bring their cultural values with them. I am NOT saying all Pakistani men are rapists. Obviously not. Nor am I calling for pre-emptive action against people based on their ethnicity. But I have had to put up with being called a racist for decades for trying to make people accept there is a problem. Again, look at Rotherham. People ringing the alarm bell were actively dismissed because (and this is explicitly acknowledged) the authorities "did not want to appear racist."
What's additionally insulting is that most of the time the person insisting I am a racist are people who don't even know any muslims. Or perhaps have a token "friend" which is really someone they work with on occasion. I've lived in areas with high Pakistani population and have had a number of friends from that background. Most of them suffered to a lesser or greater degree because of that background. In one case, my friend was sent abroad to marry someone she had met once, in Pakistan. In another, she was forbidden from talking to me and I'm pretty certain her phone was taken from her because I was never able to contact her again. This is a Pakistani girl of eighteen who literally vanished on me. I have no idea what ultimately happened to her. These were FRIENDS of mine. And *I* get called racist by people who live in posh areas that are almost wholely White and I don't think know a single muslim nor have a single Muslim friend. I had another friend (White British, this time) who was tricked into a taxi where she was molested by five Pakistani men over twice her age (she was sixteen at the time). You know one of the first things she said to me when she - crying - told me about this? "I'm not racist". Please think about that. She was grabbed and molested by five adults, held in a car against her will, and she's worried people wont believe her or will dismiss her because they'll call her racist. Consider what that indicates.
Sarah Champion - who led part of the Rotherham investigation and is a highly intelligent woman and great speaker - was dragged over the coals for saying that Pakistani men accounted for the overwhelming majority of a particular type of rape (organized, group rape). She had facts to support her statement. She did not do it in an over-broad way. But she was attacked vehemently for it. She was forced to resign her post.