I'd rather go by the endless carnage they cause on a daily basis. Wether it's Africa,Europe or the middle east.
Don't forget there are thousands upon thousands of jihadists who are happy to carry out executions,attacks etc in the name of religion.
If it's only a few then that term should be...
Very much this.
Israel have finally got a grip on this sort of thing and suicide bombings. they went through a bad 1980's. You have to be ruthless with these nutters.