We are the unholy! We are the bastard sons of your media culture! Our minds, eyes and bodies were born of your exclusion, an illusion you hide behind! You don't love a god, you love your comfort! To you we are filth, we are dirty, so be it! We are dirty and unclean, a congregation of the unseen! Together we will set this world on fire! This is the new religion!
~ Black Veil Brides, "New Religion"

Heretics are those who oppose the mainstream religions or political system. While they are not inherently evil, heretics often go on the extreme path of ruining social ideals or sacred places of worship, or mocking and hating the deity of a certain religion. Most heretics become who they are because they are rejected by a society with a religion or political belief that is different from them, although some heretics intentionally choose to be that way for the sake of causing chaos or shock value. 

This can also be used to describe villains that are blasphemous or idealistic, especially in regards to major world faiths or political ideologies, though do not confuse them with Defilers.