This is an extract from the report you referenced. Cooper being Yvette Cooper:-
“Cooper said: "Ignoring the issues, not examining and exposing them to the light, allows the criminality and depravity of a minority of men to be used to marginalise whole communities."
In a later interview, Lady Casey said the data should be investigated as it was "only helping the bad people" not to give a full picture of the situation, adding: "You're doing a disservice to two sets of population, the Pakistani and Asian heritage community, and victims."
Avoiding the marginalisation of whole communities is something I have argued all along. The police deciding not to collect ethnicity data was them following the existing protocols. Which I understood and defended. However, if the reflected wisdom is that collecting and publishing the data helps to avoid marginalisation then I am happy to accept the expert advice. As I am sure the police are. What was objected to was the desire to collect the data in order to further marginalise via headlines in the right wing press.