I do think the outrage is fascinating as well, Sakura. It happens a lot though, because in many situations like this you have:
People who want to take aspects of the past and make them part of their identity, often aspects of the past that are from other cultures geographically or from very distant time periods. Sometimes this is politically motivated from an ethnic perspective or from a gender perspective.
People who experience the past as folklore.
People who study evidence from the past and have competing views, and different political perspectives.
All of these people may feel a sense of responsibility to remember people's experiences in the past. That is incredibly emotional because people will feel that if the suffering in the past can be forgotten then the suffering of people we know now can also be disregarded. It can feel as if we are being dehumanised.
That is going to cause conflict. But all three are necessary, as long as there is a distinction made about which is which. People want to remember the past in different ways, but people can use their interpretations to justify some terrible things in the present.
I don't live in a major witch trial area now, but I did when I was younger. It casts a very long shadow. There was an area near us (a wood) which we were not allowed to go into as children, because of its association with the witch trials. That is essentially a folk connection; you cannot teach that emotional response to a tragedy from hundreds of years ago in a school. Schools teach the past in the context of learning a set of historical investigation skills; it is never going to replace people learning about their culture from their own community. It is an entirely different process, and while it is worthwhile to study history in school(although my kids aren't going to, beyond the compulsory KS3 years), the kind of impact people on this thread want the witch trials to have is not going to happen through a history lesson.