When entering Grymforge you get ambushed by another boat with Duergar. Decided to trick them instead of killing and convince them I'm doing the good Lord Absolute's work. They escort me to the landing, where I chat some more with the Duergars there.
Getting strong vibes everyone is really pissed at that Nere guy already, so okay, I will exploit that. Found the runepowder stash while searching the area for molds. Upon getting close to the dig site, I meet some other Duergar who are even more pissed at Nere.
So we basically plot against him and decide to split the treasure after Nere guy is dead. Gotta kill that watching orb tho beforehand. After putting the explosives to the rubble, Nere is free and fight starts. Like 4-5 Duergar stay hostile, the other ones fight at my side.
After the battle I convinced the suriviving Duergars to leave the Deep Gnomes at my mercy. Then they fuck off. I'm 500 gold coins richer. There was no rebellion.
Must be something allowed to you by your race. You were a drow bard right?
No. Human barbarian here, no problems (see above).