Put on (use) the Boarfiend Costume you received in the last quest. This will cause the boarfiends to turn non aggro; even attacking a boarfiend will not break the illusion so you can kill at will without drawing social aggro!
Find Bugluk at ( 1577, 457, -2 ) /waypoint 1577, 457, -2, hail him, and finish the conversation
Return back to Nesbit at U.J.L. with the new information