Both those accused in The Crucible and those accused during the McCarthy hearings were found guilty with such little evidence. One would think that such wild accusations, with so little proof, would easily be dismissed. I believe the primary source for McCarthy and the accusers in Salem's support comes from what I call the scare factor. Our country was going through a scary time, with the fear of the spread of communism on everybody's mind. These rumors of communist in the state department sparked a hunt that many backed because they were scared. In Salem the children where acting unusually and everyone was scared. When a source for this problem was suggested, because of their fear, everyone was willing to support it.
Another source of support was the get on board, or everybody is doing it mentality. Because it is human nature for one to go with the flow the people of Salem, who had religion rammed down their throats, followed their leaders, and the rest of their neighbors in the witch-hunt. Those who disagreed where considered witches. They were watching out for themselves, and because of their fear, the situation escalated and more were accused. Just as those in the story, many in our nation, and government,