The way to deal with Jehovah's Witnesses is to just say "ok wait here" and then make toast, serve it to them, and then close the door. They'll be too confused to respond to it most of the time.
Lady at church gave them a Bible. Never heard from them again.
My idea is. . .tamer than my idea. Take a large steak or butcher's knife and cover it with ketchup. Then open the door holding the knife like you're Michael Myers about to go down on someone. With a creepy voice say, "Can I help you?"
For the original sin of being white, you must be punished. Only through Globalism can you be saved. In the name of Karl Marx, our Lord and Savior, amen.