Evil - being interested only in achieving your own aims regardless of their effect on others (with a side order of enjoying hurting others) - and sanity are orthogonal. Not one-dimensional.
if you say so. are you describing a personal philosophy here? i see it differently... 'sanity' is a state of cleanliness or health, according to my understanding, etymologically speaking.
so real evil can be coterminous with mental health, in your opinion?
(replaces crotch-guard) ~"When an inner situation is not made conscious, it appears outside as fate." Karl Jung~
In the very long term I don't see evil being an effective way of operating, but you'll have to convince a lot of people to abandon foreign policy "realism".