It was incomprehensible to him that a man who’d fought against something as barbaric as the decimation at San Vittore Prison could in turn rule an army of slaves without so much as a twitch of inner conflict or a tic of self-loathing.
To me, it’s understandable: Leyers is a man with a sense of duty. Yes, he sympathizes with the prisoners, the Jews,.. but he believes that the end justify the means. Does that make him a bad person? What is bad? Is having a sense of duty bad? After all, duty or sympathy are all part of morality. How do we find the line between duty and sympathy (if such thing even exists)?
