She didn't have the energy to argue that more than a few of her victims were justified. It was an argument that had no real winner. He was correct to an extent. At least she understood some of why he was willing to help her. The wizard wanted to do what he could to keep the notorious Madam Dolohov from hurting another innocent. If that was the price she had to pay to get his help with her memory charms, she would gladly pay it. Besides, it wasn't as if they didn't already haunt her nightmares.