Groups have a center of gravity. Families, friends, churches, offices, and schools all have a dominant consciousness, a center of gravity, a party line. It's the often unspoken agreement that keeps things running smoothly based on what to believe, how to behave, what's acceptable, and what isn't. So when you charge in all excited about whatever it is you've learned, you are a disruption. And systems don't take kindly to disruptions, often expending extraordinary energy to quell the disruption, pushing it to the edges, discrediting it. This is why some churches ban books, this is why certain topics are off-limits at family gatherings, and this is often why people use words like heretic.