The calculus to make a terrorist is simple

   non-terror life opportunity
   vs
   terror life opportunity

Why you tend to have domestic terror in places with bad economies (and high economic equality). And why beliefs often drive it (religious, political, etc.), by adding righteousness to the terror side of the equation.

But requisite minimum skillset is also a consideration, and that's where drones are dangerous.

We're talking (play videogames and some soldering) instead of (chemistry or biology).