If NYPD is hacking domestic websites or reading private email without a warrant, stopping & searching cars without probable cause, doing warrantless "black bag" break-ins, or putting GPS trackers on private vehicles without a warrant, that's out of line and probably criminal.
If they're just keeping track of things
using public information (i.e., monitoring websites, facebook, etc.) I don't see a problem; don't you think LEOs somewhere are looking at firearm forums looking to see if some idiot
somewhere is advocating violent overthrow of the government, or violence against a public official?
Don't you think Klan or neo-Nazi websites are being monitored? Or should the police be (figuratively) blindfolded?
Equal protection - the constitution doesn't allow for police to create files on people solely because of their religion.
I don't even recall reading the term "files" in COTUS . . . is this one of the "auras" or "penumbras" that some people imagine emanates from that document?