Those aren't diametrically opposed.

Here's where rubber meets the road. I believe that they are opposed. An individual is either responsible for their actions, or they are not. They are a sane, mature, reasonable adult, or they are not. There is a small number of individuals who are seeking direct revenge against the US for their slain family members. Harris calls this a 'justifiable grievance.' However this group does not compose the majority, or even an influential bloc within Daesh. Daesh is primarily composed of mature adult males who are responsible for their own decisions. They have read the Quran and Hadith (More likely they have listened to a radical Imam), and their interpretation of those texts, or their Imam's interpretation of those texts, leads them to believe that they are justified in attempting to create a global caliphate. Not only justified, but compelled by holy commandment. They believe that they are bringing about the end times. They are 'victims' as much as a kid who grows up in a meth and incest riddled trailer park in west virginia is a 'victim.'

What are you attempting to convince me of? That members of Daesh are good people?

Edit*

I'm adding a hypothetical here because I think it's important to illustrate the insanity of any 'moderate' position on Daesh.

Lets say Jihadi John moves in next door. He has 4 'wives' ages 12 to 30, who are never allowed out of his house except under his direct supervision, who are regularly sexually and physically abused, and actively voicing their displeasure and attempting to leave him, but don't because he will kill them to maintain his honor. Are you allowed to say anything about him or his character? By your logic, no, because he's a victim. He doesn't know any better, it's how he was raised. Lets take it a step further, lets say he comes knocking on your door, and says if you don't get your wife to quit her job, start wearing a niqab, and both of you don't start praying a lot more, loudly, in Arabic, he will come into your house in the middle of the night with other men who share his beliefs, and kill you. What's the reasonable response?

It might seem like I'm being hyperbolic, but that's the reality of people living in that area of the world. Join I-fuck-goatsis and their interpretation of Islam, or die.