It's possible that their particular job was, as far as they know, doing good things according to most moral frameworks.
I have strong doubts that everyone who kills people by clicking on them on a computer screen thinks that what they are doing is wholly compatible with their personal moral framework. Presumably, some of those people feel very guilty about what they do.
This is about network security, defending against cyber attacks. You may or may not agree that we should have people doing that, but conflating it with imagined nonsense like this is counterproductive.