It is somewhat unclear what I can do to help you, WP:RSN is a central location where editors can weigh in on the reliability of sources. JVL was found to have numerous issues, including using Wikipedia as a source, unclear authorship, unclear sourcing, unclear editorial process and cases of misrepresenting the purported sources. 
Regarding the ADL quote - Officially, the ADL says "... " Seems open to misinterpretation vs something like: The ADL states "Officially, .." if such a quote can be found. Please understand that the phrasing should avoid any sense of editorializing on our part, if readers are left with the impression that we are sticking "Officially" in there as a weasel word it would be unfortunate.