OP, there is no point is trying to open a dialogue with the mods. They do not care about your problems, and they're intentionally obscure and opaque so they don't have to answer to you and can run their board however they see fit.
Here's how you deal with power trip mods like /d/'s resident faggot, or any other shitmod on this site who decides he gets to make up his own rules/gets to torment a specific group of users:
>figure out what content the mod doesn't like and deletes
>amass as much of this content as you can
>get a dynamic IP (or a phone)
>post the content the mod hates
>if he deletes, repost, pretend nothing happened
>if he bans, evade the ban, repost (again, pretending nothing happened, don't even acknowledge his presence
>if he whines to programmers/admins to add filters targetting the content he doesn't like, evade those
>repeat until mod either takes the hint and fucks off, or he goes apeshit and escalates and likely does something that gets them demodded or removed from modding that board (thus solving your unwarranted content removal problem)
>most importantly, never acknowledge that the mod did anything, don't give them the reaction they are looking for
This kind of person you are dealing with is a type of bully, and bullies absolutely cannot deal with their victims ignoring them, or defying them. It drives them fucking nuts and it eats away at their ego so hard they either give up and seek someone else to bully, or they snap and *autistic screeching* ensues.
In all my years of discussion boarding this has always worked to get an abusive moderator to back off eventually when all other avenues have failed. 4chan is a different situation, since NONE of the staf care, so there's no point in seeking the 'peaceful way'. Be assertive. Remind the mods they serve you, the users, and that the rules aren't theirs to make. Take your board back and don't let an autsitic sperg fuck ruin your board like they have so many others.