Friendship from the the US is like that friend who comes by, puts his muddy boots on your desk, tells you to fix his computer, stubs a cigarette out on the carpet, and on his way out punches a neighbour for looking at him funny. Once in a while he'll turn up with some guy he beat up, and tell you that this is evidence of his benevolent protection... and you'd better keep on my good side, bro. You wouldn't like me when I'm mad.
This act alone, if done publicly and loudly, would quite likely decrease any variety of terroristic threat to cooperating nations, merely through the act of disassociation with the USA, thus making their threats utterly toothless.
As it is, however, through TTIP and TPP the world is further embroiling themselves in the affairs of this embattled state, and matters can only worsen.