Thanks for pointing out those Biblical examples of how evil is to be dealt with - and subsequently celebrated.
I was also reminded of Psalms 11:10 - shouting in the streets when an evil man perishes.
Prov. 21:15
I suspect some Al-Queda members and other terrorists are getting a taste of terror themselves now. Thus to escape that, and because of their lack of critical thinking for a lifetime of heavy indoctrination of hate...they will lash out. They are in a vicious cycle that they alone cannot escape from within themselves.