I see no problem with the school allowing this kid to talk about Christ, so long as someone else can talk about whatever deity they want to. Personally I think it would be a riot if some kid gave their valedictorian speech and thanked Satan, lord of hell and slayer of infidels. Because let's face it, if there is a christian afterlife, hell is gonna be filled with rock concerts, orgies, drugs, and alcohol. What's heaven gonna be? Sitting around with the old Bible-thumpers listening to Appalachian gospel music. So anyone with a modicum of common sense would worship the Devil, because that's where the party is gonna be.