As previously, good points and well made, but with elements I would describe differently. Grooming was not my first encounter with TR, for example, but there are more significant alternatives.
There is a commonly held belief that anything not in the 'papers is not known about. You say the abuse in Rotherham was known about for at least ten years, so journalists and thugs were not the only ones talking about it. I don't know specific details of the children or families involved in the grooming gangs, but I know of many others. The public only usually hear about any of them when there is a court case, but those are the tip of the iceberg.
One well-known case was Peter Connolly, who was killed by his mother, her partner or both. The question asked so often is "Since police/ social workers/ health visitor saw this child x times in y weeks, why did they never realise there was something wrong?"
The clue is in the question. My children saw the health visitor at the clinic when we went, and she came to our house a tiny number of times. My children never met a police officer or social worker except socially. In the Connolly case, as in so many others, professionals see the children as often as they can, to get the evidence they will need in court.
Turn the story round and look at it from the opposite side. There has been a story on the site today about a child with a rare disorder. His parents noticed unexplained bruises on his arms, leading to the eventual diagnosis. I don't have the link, but it was something about 4000+ people testing for a tissue match for transfusions.
A young child with unexplored bruises is generally a concern due to risk of abuse. If details were made public and thugs decided they had a right to deal with it, I hope the public would be outraged. Even abused children have a right anonymity. Publishing their details widely does not protect those children.
The horrific case on the Isle of Bute: few people living there would have been ignorant of the killer's identity; few away from the area need to know to keep their children safe. Disclosure is of no use to the vast majority. Hundreds of ex-offenders are now living in the community. How many of us could recognise every single resident of a medium-size city, since that's the kind of number we would need to know. And that's only convicted offenders, not first timers or the as yet uncaught.
Another recent example, the girl murdered in Haroldhill. The earliest comments here were asking for the colour of the attacker. I doubt they were all Liam Neeson doing research. But why does it matter? The police need information. If you don't bother to mention a white man in a car nearby, you could have helped the getaway driver escape, or an ex-boyfriend who set up the killing.
Many crimes are committed by many people. Sexual abuse is still more likely to be carried out by a family member or trusted friend. If the public perception is that only non-whites commit crime, that simply creates hiding spaces for white offenders.
If I buy a green coat, it might be so that I can get close to wildlife, or walk in the woods without standing out. It does not indicate a hatred of red coats. The colour of alleged offenders is not the critical fact. The evidence of guilt or innocence is actually the core issue. Is it less offensive if a group of white men rapes a Pakistani girl?
Thugs have no more nor no less right to know about victims of crime than anyone else, but they have shown they cannot be trusted to handle it responsibly.