The logic of the witch hunter is simple. It has hardly changed since Matthew Hopkins' day. The first requirement is to invert the reality of power. Power at its most basic level is the power to harm or destroy other human beings. The obvious reality is that witch hunters gang up and destroy witches. Whereas witches are never, ever seen to gang up and destroy witch hunters. By this test alone, we can see that the conspiracy is imaginary (Brown Scare) rather than real (Red Scare).
Think about it. Obviously, if the witches had any power whatsoever, they wouldn't waste their time gallivanting around on broomsticks, fellating Satan and cursing cows with sour milk. They're getting burned right and left, for Christ's sake! Priorities! No, they'd turn the tables and lay some serious voodoo on the witch-hunters. In a country where anyone who speaks out against the witches is soon found dangling by his heels from an oak at midnight with his head shrunk to the size of a baseball, we won't see a lot of witch-hunting and we know there's a serious witch problem. In a country where witch-hunting is a stable and lucrative career, and also an amateur pastime enjoyed by millions of hobbyists on the weekend, we know there are no real witches worth a damn.
Tautologically, no witch hunt can be successful, for if the witches were real, they would not be caught. It’s always helpful to keep this in mind, especially since it is usually true that bullies never target the people with power, they target the people (they believe to be) completely without power. As such, you can always tell who the powerless are: They’re the ones being burned.