How to placate a very angry priest?

Question

So whilst going to rescue the Moth Priest 'Dexion Evicus', I think I accidentally might have hit him, not sure how. Anyhow the bearded maniac has taken this as a personal attack and refuses to accept a yield. Because he's so angry with me he'll just not quit, but being a quest NPC he can't die, nor can my companion Mjoll. So aside from the hilarious infinity battle, I thought, fair enough I'll talk to him whilst he's 'downed' and lo, I progressed the quest.

So I go back to the Dawnguard fortress, and he's there in the middle shouting murder and attacking everyone in the fortress! Clearly his rage knows no bounds.

Is there a way to forcibly pacify him without interring him? Or do I need to roll back and do over?

Answer 1

Opening the console, clicking on him, so you see his ingame object id, then typing disable then enable seems to have solved it.

Using setav aggression 0 didn't seem to have an affect.

Answer 2

Although there is already an accepted answer, it relies on console commands, which are not available to console players (ironically).

You can try using a Calm spell, which "reduces the target's inclination to attack for 30 seconds." However, the spell is level-dependent so you may not be able to use it on this particular NPC. You will of course also need access to the spell, through skill training or a scroll or staff.