Terrorists are generally highly altruistic, not psychopaths.
It’s a lot easier to blow yourself up(or to spread ideology which encourages it)for a cause that you believe is helping people, in particular _your_ people.
The terrorists that blow themselves up and that blow other people up are usually misguided brainwashed angry young men. It's nothing to do with ideology, everything to do with power. Or did you think blowing up schools full of girls is something people genuinely believe helps their people, to give just one example?
Ordinary people just want to be left alone. Old guys wishing for more power will use anything to get it, including sacrificing the younger generations.
No, it's something that a bunch of old guys with issues told them helps their people.
Beliefs stop when they are no longer about yourself but about how other people should live. Especially when those other people loudly protest that this is how you think they should be living. Killing them is just murder, not the spreading of ideas.
But hey, those human rights are just for decoration anyway.
The old men persuade the would-be suicide bomber that educating women will liberate and liberalize them, and that this is counter to the interests of those who prefer the traditional order of society. Are they even lying?
You're deeply mistaken if you think there aren't men who don't genuinely prefer the traditional order of women being subjugated by men.
1. Not everybody shares your values.
2. People who don't share your values are not necessarily brainwashed.
3. People may do things that are irrational under your system of values, but rational under their own.
And BTW, there is no a single fighting force in the world that doesn't have old men persuading young men to sign up and risk throwing away their lives. There's not a whole lot of difference between regular soldiers persuaded to participate in a forlorn hope or banzai charge attacking a defended position and a suicide bomber or kamikaze.
It’s a lot easier to blow yourself up(or to spread ideology which encourages it)for a cause that you believe is helping people, in particular _your_ people.