He’s hated, feared, and demonized by the establishment at large, even though he’s the only one who has real, proven integrity and a willingness to speak out against the root problems of our society and political system, rather than just criticizing the symptoms. 

He also has a very small, though very loyal and dedicated following that describe themselves metaphorically in terms that further cause the establishment to fear him. (The Ron Paul Revolution = Dumbledore’s Army).