There are two separate issues.
Are BPs really over represented in the street grooming and abuse of children, and if so why?

The survey was set up to investigate that specific crime.
It found, within the area and time period of the survey, the perpetrators were overwhelmingly BPs.
As good scientists, they said that it could have been a statistical fluke.
All those good people stated that their own personal experience of it showed the problem is really is widespread.
Many cities over many years.
Not an opinion or an argument.
Unless they all separately made up the same lie, you can not dismiss this fact.

The link with culture was made by those same people (except Wilmer)who had knowledge of the culture or were part of it.
That is their opinion .
Does that make them racist?
I was convinced by them.
Does that make me racist?