Bogus in what way?
Are you contesting the authenticity of Brenner's documents or translations? Brenner seems to deal with these issues in his CounterPunch article of 25 May 2005:
"On May 4th, an article, 'Board's Amazon Appeal,' appeared on Jewish News, a Zionist website. It reported that the Board Of Deputies Of British Jews, pro-Zionist religious Jewry's central organization, had complained to Amazon re a book I edited, 51 Documents: Zionist Collaboration with the Nazis.
"I wrote the Board. It responded. I answered their critique & challenged them to publicly debate the issue. Below is the Jewish News article and the correspondence between me & the Board."
On 5 May 2005 Brenner e-mailed his accusers:
"...Do you contest the authenticity of any documents? Or do you have problems with the translations?"
In their 17 May response to Brenner no mention is made of any issues of authenticity or accuracy of translation.
Leading Brenner to conclude the following on 23 May:
"In my note, I asked if you 'contest the authenticity of any documents? Or do you have problems with the translations?' As you raise no objection, we may treat the documents as undisputed."
If these documents are authentic and their translations accurate do you still believe the word "bogus" applies?
The Plot to Stigmatize