Were witches in the medieval times Catholic?

Of those who practiced or were found guilty of witchcraft, clearly some were Catholic, and some were not. In point of fact, some were Jewish, and some others were probably genuinely trying to curse people.

It is important to note that in Much, possibly most, of Europe, belief in witchcraft was illegal in the Middle Ages because it was regarded as a superstition. So the laws of the Carolingian Empire, the Kingdom of Lombardy, and Anglo saxon England all made it a capital crime to execute a witch. There were places where there were medieval witch trials, but not many. The famous witch hunts and executions were not medieval, but a product of the Renaissance.