I totally get that, killing by way of attacking critical infrastructure is totally morally wrong, but it doesn't justify retaliation by killing or "counterstrike". It's the reason I don't agree with the death penalty, but I also get that the death penalty is a contentious issue. My point is, killing is bad all the time regardless of reasoning (barring self defence), and justifying killing by saying "oh, they did it first" isn't ok. Surely it would be better to go about it in such a way that all killing was marked as wrong, and retaliation would be confined to reasonable legal measures, such as jailtime etc.