I've decided to pull out from this situation while the wiki staff can assess the situation and perform the actions necessary to facilitate a recovery for this individual, as the root cause of the problem is a person who I swear had the charisma of a Fallout character before yesterday, as opposed to straight-up depression (the perpetrator is a discussion mod who happens to also be a repeat offender and is currently beating his psyche in without any sense of common self-restraint.)

I'm still holding onto the plan of making an /r/SuicideWatch post, so that's still there.

All I can say is this... Call a suicide hotline, any one of them. Right now. Knowing how far this has gone, this person NEEDS help, and he needs it IMMEDIATELY. D:

But yes, refer him to a specialist. You do not have the training to take care of him, and it's more likely to traumatized you in the ensuing . . . well, trauma. I know it's tough. But you are in control of your own actions, and no one else's. You can neither stop him from hurting himself, not enable/force him to do so. All you can do is reach out to him and talk to him, and get him to talk to a more qualified form of help.

For what it's worth, I've been on both sides of that line, at various times of life. Talking will help with most people - if it is not helping, it is not your fault, but definitely get more professional help.

I don't know what to do in this situation, and I don't know enough about the current situation. You need to say more.