I want to fullfill this. However, I already found the traitor among the cultists, so they don't want to fight me.
I forced a fight with them and killed them all, but I couldn't find the amulet. I then found that the whole section of the map was hostile to me - not just the cultists.
1. Is it still possible to get the amulet?
2. If I am 'pro-rebel,' will killing everything in this area hurt me with the rebels? The whole point was to fulfill the rebel quest. However, I am wondering if I lose points with the rebels by killing everything in this area. It might defeat the purpose.