From Inside Edition.

A masked man dropped off a holiday note at a doorstep with a threatening message before blowing a kiss to the camera. Video from another neighbor shows two masked men, one with a knife strapped to his waist, leaving a frightening Christmas card in a planter. The cards and notes that were left at multiple homes along a street in Yucaipa, California, look cheerful on the outside but inside, they contain disturbing messages about Nazis.