From several recently released studies using a sample of 66 ex-combatants and 66 control participants showed considerable similarities in all investigated areas except one: Moral judgment. The 66 ex-combatants were incarcerated in Columbia and former paramilitary operators.
Baez, S., Herrera, E., Trujillo, N., Manes, F., Young, L., & Ibañez, A. (2016). Aberrant moral judgment in extremist terrorists. International Journal of Psychophysiology, 108. Doi:10.1016/j.iipsycho.2016.07.344
Baez, S., Herrera, E., Garcia, A. M., Manes, F., Young, L., & Ibañez, A. (2017). Outcome-oriented moral evaluation in terrorists. Nature Human Behaviour, 1. doi:10.1038/s41562-017-0118