Don't try to tell them anything directly. I usually say something like "You have to admit that 99 page FISA court opinion is pretty disturbing." As if they would already know about it. When I get a blank stare I say "You know, the one where they found out the FBI was giving access to spy stuff to private contractors." No one likes to feel stupid that they don't know something so they go look it up. Starting with something like a court document is the best way to get someone like me started down the rabbit hole. Corruption like that is something everyone can understand. FISA literally was THE START for me. They'll start digging and you know what happens then.