I tried giving it a shot. It starts with an "executive summary", followed by an intro to how Wikipedia works. The very first link to any concrete evidence is by a guy who has a page on PragerU with gems like "Russian collusion hoax" and how the "mainstream media" is "fake news".
It's a pretty simple case of Wittgenstein's ruler for me. It tells me more about ADL as an org than the content.
Oh, that's VERY interesting. Thank you very much. Needs to be checked a bit more thoroughly, but the ADL report and the D.C. U.S. attorney's letter seem to have significant thematic overlap. It could well have served as one of the sources.
Read it for yourself.