Complex sentence: Under colonial rule, traditional diviner-healers were outlawed because they were considered by many nations to be practitioners of witchcraft and declared illegal by the colonial authorities creating a war against witchcraft, magic, and sorcery.
Split into simpler sentences: Under colonial rule, traditional diviner-healers were outlawed because they were considered by many nations to be practitioners of witchcraft and declared illegal by the colonial authorities. This created a war against witchcraft, magic, and sorcery.