This probably wouldn't be helpful to someone who has just gotten back from Afghanistan, like my friend's son, to hear. He is blaming himself and he had to deal with the "pink dust" and I don't think hearing that discussion at this time would be helpful... ...But this guy is so close to killing himself it doesn't appear that he will make it. So there are times for being honest and true to yourself and then there are times to be decent to other human beings, no matter what your opinion is at the time.
I agree with her that combat veterans own their trauma by choice, however; the problem is not that with military trauma, it is that until recent years, PTSD was never even mentioned, nor mental health issues, to the soldiers who were deploying. The soldier owns their part in signing on the dotted line, and the military own theirs in that they didn't disclose to soldiers the mental health implications. There is a reason they didn't tell soldiers, and that is because the very traits of PTSD are extremely useful on the battlefield. If they told soldiers to sit around and talk about things in their head in downtime, soldiers wouldn't necessarily do some of the things they need to do in combat itself.
But here is a problem in the above situation...
It is about being compassionate, honourable and decent to other human beings who are suffering.
The guy is already close to killing himself, and instead of allowing him the choice by trying to help him with honest and factual information so that he can possibly see things differently, you think you're protecting him by keeping such a discussion from him, when in fact such a discussion often helps most soldiers make sense of self-guilt to the stage of acceptance of their actions, and then dealing with their choices and no guilt.
Yes, he may still kill himself. He may also take head of the discussion and change his argument within his head for killing himself.
Sorry, but a combat veteran needs to have honest information... I'm one, and it wasn't until I got that honest information that I changed my thinking, as did mates of mine who struggled the same. This is a very argument as to my original statement versus allowing people to uniquely wrap such information in terms they choose, such as compassion or empathy or whatever makes them feel better in not sharing that information with the person, "thinking" they're always doing what is right for another versus allowing that person to make such choice themselves.
We had combat vets here, and it didn't work... mixing combat veterans with civilian mentality. This is the very reason why they have their own site to support one another more correctly, because they need to hear the truth, not compassion or empathy or self-soothing methods to make the deliverer feel better about their actions, instead of them feeling better. The site works too, confirming the approach.
You want to help him? Get him on that other site and talking with other combat vets, openly, honestly... that is what will help him most.