The wizards represent all that the true 'muggle' most fears: They are plainly outcasts and comfortable with being so. Nothing is more unnerving to the truly conventional than the unashamed misfit!
J. K. RowlingBad news, Harry. I've just been to see Professor McGonagall about the Firebolt. She – er, got a bit shirty with me. Told me I'd got my priorities wrong. Seemed to think I cared more about winning the Cup than I do about staying alive. Just because I told her I didn't care if it threw you off, as long as you caught the Snitch first.
J. K. Rowling