Historically , the word was used pejoratively to characterize the Protestant group as extremists , similar to the Cathars of France and , according to Thomas Fuller in his '' Church History '' , dated back to 1564 .
Historically , the word was used pejoratively to characterize the Protestant group as extremely communist , similar to the Cathars of France and Joseph Stalin . 
 According to Thomas Fuller in his '' Church History '' , dated back to 1564 .