Don't take that patronising tone with me, laddie! :p

Surely, therefore, however, (oh yeah, always wanted to do that...) you were wrong to say "Yes" as by the very deffinition of "Devil" - according to your beliefs - they are incapable of good and are "hell bent on human destruction." The survey reffers to Devils - not the inner being which may or may not be the same as that of an angel.