Bin Laden does reprehensible activities, and we should surely take care of that by killing him as soon as we can. But he's not an irrational man. He's a very worthy enemy. He's an enemy to worry about. ↗
I think anybody who has been abused as a kid - and I was abused as a kid, by various people - will say it's irrational because violence is irrational. ↗
Interestingly, human irrationality is a hot topic in economics at the moment. Behavioural economics it's called, on the cusp of economics and psychology. ↗
Nine-tenths of tactics are certain, and taught in books: but the irrational tenth is like the kingfisher flashing across the pool, and that is the test of generals. ↗