He popped into the cemetery to kill the woman. She had killed her parents by making a demon deal. He realized he could kill the other two also. Their father had sold his soul and died to bring the older of the two back. That made him responsible for his father's death. And then he had sold his soul for the younger one. He wasn't dead yet, but he soon would be, and it was the other's fault. They hadn't seen the ship, but sometimes rules were meant to be broken.
Then he turned and saw his own brother. That's who he really wanted.