I like this email:

Here’s something to toss up and bat around with Derb for a while…
Isn’t the conclusion that “some people are just evil” a sort-of “Satan
of the Gaps” position? An abandonment of science in favor of a
faith-based conclusion? Is Derb satisfied with leaving it at “evil”,
or does he think we need to keep up the “mad rush to ‘understand’ evil
people”?
(With respect to the existence of evil, let me say that I agree with
you. Let me also say that I’m not particularly satisfied with
intelligent design although I certainly do find evolution to be a
woeful theory for explaining the emergence and development of life on
earth. I also understand that there’s a fair amount of daylight
between your position on ID and Derb’s).