Don, more data would be good.
What we have.

Police officers who say there is a specific problem in certain areas.
Sikhs who say they have a specific problem.
Hindus who say they have a specific problem.
Investigative journalists who have found a specific problem.
MPs whose constituents report a specific problem.
A specific problem in Blackburn that vanished after a targeted intervention.
Shafiq who had personal experience of this specific problem.
Ahmed who had personal experience of this specific problem.
Allibhai-Brown who had personal experience of this specific problem.
Wilmer, who's 400 cases were all of this specific problem.
Dando Institute whose investigations found overwhelmingly this same problem.
CEOP whose national figures showed the same problem.

You can say it is not proof, but it is very convincing evidence.
Everyone here is convinced but you and Jim.
No evidence is ever going to convince you two, so I am done.