>In particular I find the constant harking back to "Well, we don't spy on US citizens, only everyone else." particularly annoying.

It is annoying, but there is a reason why it is being said. Laws (are supposed to) prohibit (more or less) the US spying on its own citizens without cause. It is written into the constitution (more or less). Foreigners don't have that protection under law. Whether that should be changed or not is a different question than are these programs legal under current laws.