'Somehow other US allies don't have these sorts of "hey let's spy on our friends" impulses'
Pretty much any US ally with a functional intelligence capability spies on the US. And we spy on all of them. And it's not always for traditional diplomatic or political purposes. Some governments, such as France's, have a tradition of aggressive espionage to get a commercial advantage for domestic corporations.
Pretty much any US ally with a functional intelligence capability spies on the US. And we spy on all of them. And it's not always for traditional diplomatic or political purposes. Some governments, such as France's, have a tradition of aggressive espionage to get a commercial advantage for domestic corporations.