As I said , the theory is not mine.
I don't care if you accept it or not, but the proponents are much better informed on the subject than all of us here put together.

As for the over-rep, there is ample evidence of children abused, in this particular way, by BPs.
I have seen no evidence of other groups involved.
Clearly none of you have either or you would have mentioned it.

Here is some of the evidence.

The journalist Bindel after a rigorous investigation found large numbers of girls who had been groomed by BPs, but none by other groups.
The German video report, no longer on YouTube, found exactly the same.
Jack Straw spoke about his own personal experience and contact with victims.
The Dando Institue report on On-Street Grooming By Gangs, that has resulted in at least two follow up studies of On-Street Grooming By Gangs, that found 95% BP perpetrators.
Ann Cryer said she had the same experience in her constituency.
Hilary Wilmer with her hundreds of cases, all BPs.
She corroborates all the previous.
Senior police officers, serving and retired.
Shafiq, Allibhai-Brown and Ahmed all tell the same story from BP perspective, and it corroborates all that has gone before.
Hindu and Sikh organisation who report hundreds of their girls have been victims too.
Perpetrators, all BPs