I do understand. My country (Australia) has US spy bases in it too ( https://en.wikipedia.org/wiki/Pine_Gap ), which they have also used to spy on Australians. In Australia's case (and I would be willing to bet that it's the same for Germany), it was a quid pro quo arrangement. Australians spy on Americans and pass the information to the NSA. Americans spy on Australians and pass it to the Australian spy agencies - thereby avoiding restrictions on domestic spying. Seriously, your problem is with the BND, not NSA, because NSA is going to spy on you regardless of whether you want them to. It's pretty much their job. You just don't want the BND actively helping them, which is why your energy should be directed towards them.