So, he thinks it's not fault of suffering parents in USA or Pakistan that drones are raining down and killing people?
Well, the US parents have a little bit more culpability, but it sure as hell isn't the poor Pakistani woman's fault that her babies got blown up while collecting dung on the side of the road.
Belive it or not, everyone get what they deserve.
Blaming the victim no more works for a drone strike on an innocent child than it does for rape.
"The victim is to blame" is what evil people (rapists, murderers, supporters of murderous democide, supporters of organized thieves) tell themselves, so they don't feel like the shitheads they really are.
Instead of trying to persuade evil people -- like your interlocutor -- to realize that they are evil, I actually prefer to spend my time analyzing what sorts of mental / physical / sexual abuse lead people to become evil in that way.
Think about it: a person must be have been subject to a years-long, very prolonged and intense campaign of abuse-originated stress, to conclude that innocent children who got bombed "got what they deserve". How many times was he beaten / yelled / punished / suppressed, and then told that his victimization was "his own damn fault"? Probably quite a few times, enough so that his frontal neocortex was utterly ruined, now malfunctioning in this spectacularly catastrophic way.
Really, you're witnessing an extraordinary case of Stockholm Syndrome, dialed all the way up to 11. Not unlike a squashed bug, his dysfunctional brain is hobbling him through his life, and you get to study this psychotic malfunction up close, even interact with it. You get to learn exactly what mechanisms he uses to deny and distort reality, what things he says (ostensibly to you, but really to himself) in order to actively suppress his own conscious mental processing of facts.
Take the example of him telling you that "firebombed children deserved it, and you can't say otherwise, because there's no way you could possibly know everything". Think about it: if you stabbed him in the eye, and you then told him "it's your fault" and "don't argue with me because you don't know everything", he will likely yell that you're crazy... but he has no problem with himself making this very same irrational "argument" to excuse / apologize / minimize much, much worse evils. What do we call this behavior of his? Is this a symptom of a spectacular case of localized schizophrenia?
Of course, the problem is that lots and lots of people actually
do behave in exactly this mentally disturbed way (didn't, like, 20% of people just vote to re-empower the murderer who orders firebombing of children?). That's why this is a social problem that warrants study. As long as millions and millions of potentially dangerous (but rather cowardly) brain-damaged political schizophrenics chip in with their implicit or explicit support for empowering mass murderers, this will continue to be a problem of enormous social significance.
Of course, I can't have pity for an anti-social monster who says that bombed children "got what they deserve", but I can try to understand the source of that monstrosity. Explaining is not condoning.