NEW YORK - It's usually easy to tell where a person stands in the culture wars, but whose side is someone on when his Christmas decor is a blood-spattered Santa Claus holding a severed head? Joel Krupnik and Mildred Castellanos decked the front of their Manhattan mansion this year with a scene that includes a knife-wielding 5-foot-tall St. Nick and a tree full of decapitated Barbie dolls. Hidden partly behind a tree, the merry old elf grasps a disembodied doll's head with fake blood streaming from its eye sockets. No one answered the family's door to explain on Tuesday, but...