Viviane
So you think we should just incarcerate these people in institutions where it is proven they have the capability to influence and recruit others to their cause to commit further atrocities .
These people who commit these atrocities are not crazy/insane , get that idea out of your head , they are terrorists , they know exactly what they are doing and are prepared to suffer the consequences , albeit a misguided belief/indoctrination they will entertain 70 virgins in the afterlife.
If they are dead ,they cant be an influence or encourage anybody else to engage in such activities .
smiddy