We are not at war with bombs of any particular design, or guns, or rusty knives for the hacking off of heads, or even “terror” itself. We are at war with a totalitarian political ideology masquerading as a religion. Its adherents want to subjugate all who are not of them to their will, or kill them. That is, us. And as long as that belief system has many millions of adherents (and it does), even if only a small percentage of them have sufficient competence to kill the millions that they hope to in order to achieve their goals, they will, as technology continues to advance, succeed.