There is a huge difference between your product being used for basic military operations like taking notes or getting from A to B, and your products suggesting military operations that kill hundreds of schoolchildren, an obvious and horrific war crime.

Thou shalt not kill, that's all there is to it really

If you provide tools that help an organization kill easier, and possibly lazily rely on your inaccurate tools' judgment, and you do not care about the outcomes of these tools' uses, that's on your soul, too.

Yes, causality and attribution are hard sometimes, but it may have been that without it, hundreds of humans would be alive right now, and he doesn't even know. Maybe he should talk to the kids' parents about what alignment means.