Re: Spying on everybody but your own is Okay ?
There are, in fact, fairly extensive controls, both legal and practical. US citizens, and noncitizens within US jurisdiction, may not be targeted by US agencies without a warrant issued by a judge based on a reasonably substantial claim of probable cause to believe that he (or she) committed a crime or was about to. "Minimizations" to protect US persons - both citizens and non-citizen residents - are described generally in 50 USC 1881, implemented by extensive procedures within the NSA and Department of Justice, and overseen by the Foreign Intelligence Surveillance Court, composed of federal court judges nominated by a US president and confirmed by the US Senate. It is not clear what countries have tighter legal controls on surveillance of citizens and legal residents. In addition, while the NSA and other intelligence and law enforcement agencies have many employees and very large amounts of computing and communication equipment, only a relatively small fraction of those employees are engaged actively in surveillance and the equipment is capable of collecting and storing only a tiny fraction of all possible communication data. Both impose significant limits on the number of people who can be targeted effectively and the amount of data that can be collected, stored, queried, and analyzed.
The case at hand is about boundary issues - the circumstances in which data collected for foreign intelligence can be used for surveillance of US citizens and residents. My sense, possibly incorrect, is that the plaintiff's attorneys, expert though they may be, do not have a very strong case and are likely to lose to the government's lawyers, who also are experts in the matters at issue.
Your English usage, by the way, is entirely adequate, and in fact is better than that of a great many native speakers.