de Dios works in the service of an attack on goal, helping the ball over the keeper, across the line, or to the foot of a well-placed teammate, la Mano del Diablo does its opposite - a hand raised on the line to stop a ball speeding toward the back of the net. The Hand of God works in one direction, the Hand of the Devil in its opposite.
The special cruelty of the latter was revealed today when Uruguayan striker Suarez denied a last second header from Ghana's Dominic Adiyiah. Suarez drew a red card - it was a hand ball, clearly denying a goal. It's what's known cynically as a "professional foul," because in this instance, a goal is not automatically awarded. Instead, the offended team takes a penalty. Asamoah Gyan - a truly marvelous player, hit the cross bar. As we all know now, Ghana then went out on penalty kicks. Suarez got his team through, though perhaps it cost him a piece of his soul (and his presence in the next match). My post regarding Mexico's loss to Argentina still applies, but here a twist of fate feels more like a knife in the back.
[If you are new to the whole "hand of God" thing, see this BBC interview with God himself.]