As with your last post, Andrew, I'll say thank you for posting. It is an interesting story.
However! Tituba was a slave. I suppose she believed in witchcraft, as most people of the time did, and probably practiced it. Just like we...whatever...knock on wood or acknowledge little superstitions.
Who could blame someone for confessing, when threatened with death? Many people accused in Salem did. The ones who didn't were executed.
The story of Salem is very complicated and many different theories have been proposed by historians and other writers. As I see it, Tituba was just a bit player, a victim (if not a totally innocent one, yet not malicious) caught up in a tidal wave of hysteria.