Pattern? What pattern? I see no pattern. No, definitely not.....
Here's the thing. Certain offences often have offender profiles. Most sex offences have the profile of "white, middle-aged, male" - institutional abuse, sports club abuse, stalking, etc etc etc. All "white, middle-aged male". One sex offence from all the others, on street grooming, has a profile of "Asian male".
I see no reason why this shouldn't be spoken of. Just as we know that almost all sex offenders are male, we also know that most institutional abusers (teachers, priests, etc) will be white and most on street groomers will be Asian.
Observing and recording offender patterns is a good thing for prevention.