People are afraid of things they don't understand. They don't know how to relate. It threatens their security, their existence, their career, image.
The department was set up primarily to protect us from another terrorist attack from Islamic terrorists, and yet they talk about everything but that.
I would love to tell you I've found the secret to eternal youth. I go to the gym and avoid too many chips. I love to eat, hate to work out, but if you can't count all your ribs from a distance you're considered obese.