If John Wayne Gacy had been an asshole, a lot of nightmarish things might've never happened. The notorious serial killer tortured, raped, and murdered at least 33 young men and boys after luring them into his house. If he'd been an asshole, Gacy, who was executed via lethal injection in 1994, might not have been able to commit all those atrocities. Unfortunately, he "was so nice." That's what the Kinks' Dave Davies says, anyway. In 1965, two years before he was first arrested for sexually assaulting a teenage boy, Gacy lived in Springfield, Illinois and worked as a shoe salesman. He was active with his local chapter of the Jaycees, a civic organization for young people. As Best Classic Bands points out , the Kinks embarked on an ill-fated US tour in 1965, and the fifth stop on that run was a badly attended gig at Springfield's Illinois State Armory. The Jaycees promoted that show, and Gacy apparently invited the band to stay at his house.…