Why extremist/terrorists target holy places?

There are 3 things things that motivates people (actually blind-fold them) to do good, bad and ugly things

  1. Religion
  2. Politics
  3. Ethnic lines

out of these 3 religion is the most easy to play with and being jahil only make it easy for manipulators. People only realize this once they take a break and see the storm from outside. For people within the storm, manipulators never let them think hence there is no risk of getting alienated that quickly.

btw, sooner or later people DO realize but only after paying heavy price.