:(after edit conflict) - From WP:BLP, the most important Wikipedia policy when it comes to biographies (I've added extra emphasis): 
 ::"[Content] should be about the subject of the article specifically. Beware of claims that rely on guilt by association." 
 :In otherwords, you cannot use the misdeeds/mistakes/scandals/whatever of other people to provide negative color commentary within a biography. WP:NPOV is applied to the subject of the biography (if proper sources can be found). I applied those rules with a pair of edits (diff1, diff2) which  then refined by adding a necessary soupçon of context. There was nothing disruptive, tendentious or astonishing about these edits, and they were supported by a trio of editors afterward. You cannot discard or ignore WP:BLP and seek solace in other policies, just because it handicaps your attempt to push your non-neutral POV.