Exactly the correct point; and almost silly, a child could see that, although apparently most adults have difficulty. Friendship with all peoples, unless they interfere with our INTERNAL affairs should be our motto. Simple -- and needless to say, constitutional.

Could it be that arms/weapons are the US' biggest export industry? Older articles but relevant. War is (still) a Racket.

http://www.nytimes.com/2012/08/27/world/middleeast/us-foreign-arms-sales-reach-66-3-billion-in-2011.html?_r=0

http://www.globalissues.org/article/74/the-arms-trade-is-big-business#GlobalArmsSalesBySupplierNations

Also, Max Keiser - https://www.youtube.com/watch?v=c3JgzTCzTi4