In my opinion, this is the most dangerous statement in this thread. Saying the actions of these people is irrational loses any ability to understand why they're doing what they're doing and how we can stop them. It turns them into a faceless enemy who are doing things because of hate, which is easy and makes my ego feel better, but doesn't really explain their actions or the actions of anyone. Nobody thinks they're the bad guy of their own story.
There is nothing more rational than terrorizing civilians to achieve a goal. It is the logical conclusion of rationality.
* Kill an innocent civilian * Have or perform an abortion * Eat meat * Fight in a war * Drop an atomic bomb on a city * Commit suicide
That's all shit that some people call rational and others call irrational. The truth is that "rational" is a word we choose because it sounds objective and authoritative, but it really means: "something that makes sense to me"