Puritanism is based on belief that only a few select people are getting into heaven. With that said, Puritans try to maintain a Goddly and holy life. But if anyone questions that, they're thought to be unholy. So in the beginning of the Crucible, Parris' daughter, Betty, is dancing naked with a black slave named Tituba. Reverend Parris catches them both doing this. After this scene, Betty passes out, which causes the townspeople to suspect witchcraft. Because of this a group of girls start havoc amongst the town accusing women and men of being witches. They do this because theyre trying to cover up what they were doing in the woods. These rebelious girls are the reason that some women and men of the town are declared witches and get hanged. The reason this all happened is because some girls just wanted to do something that wasn't considered holy, but while they did this they didn't want anyone to know. If the Puritan town found out then the girls would be considered "Unholy" and were going to hell.
I think the point Arthur Miller was trying to make is much deeper than just a time in history made into a play. I believe Arthur is trying to say that it is impossible for a human to be perfect. We are all going to make mistakes, but that is no reason to believe that we are all going to hell, no matter if you have made one mistake or a billion.
There were so many surprising aspects to this book: the drama, the lies, the unfair judging, and all the people affected. The whole town became infected with this disease of fake witchcraft. The witchcraft was really themselves!