I mean, Germans know exactly what happens when surveillance gets out of control - the Wikipedia page about the Stasi [1] is pretty good, including lines such as "counting part-time informers, the Stasi had one informer per 6.5 people" and "As the GDR began to fall, the Stasi did as well. They began to destroy the extensive files that they had kept, both by hand and with the use of shredders. When these activities became known, a protest erupted in front of the Stasi headquarters". Can anyone imagine US citizens storming the NSA, or the FBI? Even today those files are being reassembled, because people wants to know what happened.
And yet, what happened during the conference [2]? Angela Merkel essentially stepping in defense of Obama. She could have said she didn't agree. She could have remained quiet. And yet she speaks (mildly, though) in his favor, even while by her own admission "the questions have not yet been satisfactorily addressed". That was disappointing.
[1]http://infowars.net/articles/september2007/050907Merkel.htm
[2]http://www.dw.de/german-chancellor-merkel-rebuffed-on-terror...