Keith Henson — American Scientist

Howard Keith Henson is an American electrical engineer and writer on space engineering, space law (Moon treaty), memetics, cryonics, evolutionary psychology and physical limitations of Transhumanism... (wikipedia)

Evolution acts slowly. Our psychological characteristics today are those that promoted reproductive success in the ancestral environmen.
Most of the suicide hijackers came from Saudi Arabia, a place not lacking in wealth. But due to rapid population growth, the wealth per capita has fallen by about half in a generation.
Fighting hard to protect yourself and your relatives is good for your genes, but when captured and escape is not possible, giving up short of dying and making the best you can of the new situation is also good for your genes.
Could people be trained to be less gullible? Or are you as stuck with gullibility as you are with skin colour?
People can undergo a sudden change of thinking and loyalties under threat of death or intense social pressure and isolation from friends and family.