Garth Ennis and John McCrea, with the able assistance of a demon from hell, a ghostly confederate general doomed to haunt a World War II tank, and several demons from Nazi Hell, thoroughly examine modern racism in The Demon #48:
but he writes the best Superman this side of Grant Morrison.
From JLA/Hitman, a two-issue miniseries that came out a couple years back. Words by Ennis, art by McCrea. DC, get to trading the rest of Hitman asap and include this, thanks.