This is a modern remake of National Lampoon's Christmas Vacation. The conceit is that the family goes to visit their in-laws who have fully converted to white nationalism. Hilarity ensues when the Chevy Chase character has to put swastika lights on the house, deal with the neighbors, and help his father in law convert the basement into a crematorium. The rebellious son confronts his parents about dating a Chinese Becky and whether that's acceptable. The film culminates with a massive set piece where everyone congregates on the snow-covered lawn and sings Deutschland Uber Alles while smoke rises from the basement smokestack.

(http://www.autoadmit.com/thread.php?thread_id=5802016&forum_id=2.#49457773)