There are crazy people and crazy organizations in every country. An extremely small percentage are sufficiently motivated to carry out violent attacks.
When you bomb, shoot, torture, and aid in the oppression someone's family members, friends, and countrymen, that makes them hate you and want to hurt you. Aside from being common sense, this is well understood even within the US military establishment[1][2].
When you bomb, shoot, torture, and aid in the oppression someone's family members, friends, and countrymen, that makes them hate you and want to hurt you. Aside from being common sense, this is well understood even within the US military establishment[1][2].
1: https://en.wikipedia.org/wiki/Blowback_(intelligence)
2: http://www.businessinsider.com.au/mcchrystal-admits-drones-i...