Think of ways that you do things that other people do things differently than you.
Religion- different religions celebrate different holidays, different services (like church), some people aren't religious at all
Backgrounds/cultural identity- people come from all different places, some even from other countries. There are things like languages and foods and traditions that come with it
Social cliques- People tend to talk to those who are most like them, so there are different groups in environments of different people.
Tituba was the first one blamed for witchcraft because she was a slave, the lowest of the low, the bottom class, below even the poor and homeless. Not only did this make her an easy target of blame for the girls, but to make her situation worse, she had been known for having known voodoo from her home in Barbados. She had been the one to stir the pot, and to sing songs in her native tongue. It is for all these reasons that the blame of witchcraft was thrown at Tituba. I hope that this answer helped!