The secret ingredient is 24/7 propaganda.

I can probably make you hate basically anything I can come up with if I can get a 24/7 stream straight into your earcanal. You are just as susceptible as anyone else, and you likely hold beliefs right now that came from some of the very same outlets. Just as hard a time as you have seeing that this is the actual case, is just as hard as the people believing this fringe shit right here have.

Human psychology is fantastically malleable, and contrary to popular opinion, we have a very good grasp on how the mind works.