It’s a combination of books, news sources, and some formal education. I was lucky that my highschool still heavily invested in humanities before I went off to a stupid ass tech collage. Beyond that I am constantly researching things because I’m weird. So when people pull up reasons that are fairly well documented quite literally easily sourced on wikipedia of all places it’s incredibly easy for me to remember and reference them.
US 2010: “We’ve created and incentivised this gigantic drag net of information based on insecure protocols, private partnership deals, FISA court orders, and outright black budget illegality”
US 2024: “Pweeze use encrypted communication (that we have vendor relations with or that we have backdoors in or that we built as a honey pot) because China can see what’s happening in the drag net and they can leverage that information to compromise our idiot elites.”