"Because I read. Every year, during the summer, I pick up discarded newspapers and get snips and pieces from the news Uncle Vernon watches in the evening. Though he usually talks trash about whatever is on, I can see that people discriminate. Some even go to war against those of different races, beliefs, or even resources. If muggles ever suspected our existence, they would set up facilities where they would use us as lab rats to discover the source of our magic, finding ways to use it for their own gain. Ultimately, they would eradicate us if they could not bend us to their will." Nodding towards Tom, Harry added quietly, "And this time there wouldn't be pyres. They would bomb us off the face of the earth. Some of them even going so far as to accept civilian casualties. I can't ... we, can't let that happen. Not if we have a chance to prevent it."