In the Middle Ages it was not uncommon to accuse someone of heresy. If the accusations could be proven, the culprit would go through a ritual. Since torture could be used, the accusations were often proven. The ritual was done to save the soul of the convicted criminal. It involved being burnt while tied to a post.
Still in the 21st century Muslims who apostatize are often treated very harshly and frequently killed.
The Roman Catholic Church sees a few heresies in Protestantism:
- Protestants claim only scripture (the Bible) is relevant for the faith (sola scriptura); the Catholic Church says traditions are also important.
- Protestants say that belief is enough to be saved (sola fide). Catholics say that good deeds are necessary as well.
- Protestants say that anyone can be a priest; the only requirement is that the person is baptised. In the Catholic and Orthodox churches, priests are ordained. This means that some people are not priests, even though they have been baptised.
- According to Protestants, there is no Transubstantiation during mass (liturgy).
- The Roman Missal contains heresies, according to Protestants
As a result of the Protestant Reformation, the Congregation for the Doctrine of the Faith was created in the Roman Catholic Church which protects the Church against heresies. It is the last instance to decide what constitutes a heresy, and how to deal with it.
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Heresy Facts for Kids. Kiddle Encyclopedia.