This is the understood and expected function of the NSA

The task of the USG should be to level the actions of its intelligence agencies. If it's ok for the USG to fuck with their allies, then it's the way it is. But don't expect every of its allies to agree with that. There's a difference to spy on everything which moves in Iran/North Korea or France/Germany/you call it. This is making waves in Europe ... I am not sure if that is worth to piss off your close allies.

This might not be getting the big news in the US, but it certainly does in Europe. And if there is only a slight chance that this might affect the opinion people in Europe have about the US(G), everybody in the US should be worried.