Irrelevant.The hypothesis is that crimes within certain groups go under reported and there is a reluctance to investigate given the allegations of institutional racism
Over 80% of CSA/CSE crimes are committed by British white men. A large majority of group CSA CSE offences are committed by white British men.
Undisputed.
The fact that the remaining offences percentages are difficult to distinguish (ethnicity wise) is both irrelevant to the above facts and the fact that you were wrong.