There is no policy basis for the block.  Your idea that engaging in a discussion in an article talk page (with only two comments, no less) in a way that involves policy constitutes a policy discussion is just preposterous.  Posting the murderer's name on the talk page does not constitute disruption: yes, making a point, but no, not disrupting Wikipedia, and in any case they've promised not to continue.  And given that you have been involved in the discussion and taken a clear stance against this user's opinions (as established by you here), it might be best for you to let it be.  I honestly see at most 2 who really support the block: you and Jayron, and you'd been involved in the dispute.  Arguably Exploding Boy might have, but his one comment has  been contradicted.  Roux, Hersfold, and Baseball Bugs never said anything about the block, and Roux is highly involved anyway.  Enigma "supported" a checkuser but gave no reasoning at all.  Plus, we've gotten concessions from the user.  juicetalk