Comparing a run-of-the-mill defense contractor to a serial rapist and murderer is certainly up there in the most unhinged justifications that I've seen on HN.
Nevermind that he literally was equating the two and explicitly says so.
Kill a few dozen people with your own hands and people are (rightfully) horrified.
Run a business that enables the killing of orders of magnitude more people, and you can be a respected pillar of society.
Killing instantly becomes respectable if it's done legally and for profit.