It is good to ask yourself questions. Why am I doing this? That's a good one. What is the source of these thoughts? That's another good one to ask yourself, especially if you do find yourself becoming paranoid or afraid, for no real reason.
How? Is a good one as well. How can manipulation and mind bending used in news and information be considered a chemical weapon? Affects the chemical balance in the brain, triggering thought processes that open little passages in the mind, where thoughts can enter with ease and stick. Triggering fear and uncertainty; makes one alert. They pay closer attention and think less about their surroundings, focused mostly on what's directly in front of them. Something like that...