Jim,
Where is your evidence that The Labour investigations were rigged - does anybody else claim it?

"Rigged?" No-one used that word about them!
Plenty of criticism though.
Not of the Oxford enquiry obviously, because it has been withheld.
You have to wonder why.
Here is David Hirsh on Chakrabarti.

"What Shami Chakrabarti failed to do in this report was to explain how to recognise contemporary left wing antisemitism. She failed to describe it, how it operates, how it is sometimes hidden, and what its key tropes are.

She had every opportunity to do this in a way which could be easily understood because her inquiry was precipitated by a number of examples of left wing antisemitism. She could have gone through them and explained why they were antisemitic. She did no such thing. Indeed there were two incidents which happened at her very launch which illustrate precisely the kind of antisemitism which requires explaining and opposing....

In my submission to the Chakrabarti Inquiry, I wrote: "A bad apple theory will not do as an explanation for the current phenomenon of antisemitism on the left. We need to understand what the problem is with the barrel which has allowed so many apples to turn bad."