David Zucker’s “An American Carol” is a goofy, over the top and occasionally risqué comedy in the tradition of his previous film genre parodies “Airplane” and “Top Secret!” The plot revolves around the efforts of documentary film producer Michael Malone (read Michael Moore) to abolish Fourth of July as a holiday. Malone’s rationale being Americans should not celebrate the birthday of an oppressive, racist, sexist, warmongering nation. To convince Malone of the error of his PC pieties, the ghosts of Presidents John F. Kennedy and George Washington, General George Patton and the Angel of Death (played by country music artist Trace Adkins) visit him à la the spirits in Dickens’ A Christmas Carol.