OK, I don't see it - so you're going to have to explain, logically.
you can't have morals and traffic with the Devil, it doesn't wash.
To gerrymander a new understanding of "evil" for every separate occasion and then ignore the resulting cascades of inconsistency...

Let's be blunt, if you accept a notion like "evil" then you can't escape it with convenient No True Scotsman devices. To conceive evil is to live with it, at all times.