A fanatic was initially ‘one who was inspired by god’, zealous in all he did in the service of his god. Only later did this become debased into the more negative meaning of someone who has no sense of respect for physical life. It is, unfortunately, this latter interpretation that surfaces in many of today’s dreams.
Psychological / emotional perspective: When we find ourselves in dreams being totally focused to the point of fanaticism on a particular outcome it is perhaps wise to consider and appraise our commitments.
Material aspects: Without determination and tenacity many tasks cannot be completed. Dreaming of a known fanatic or act of fanaticism can help us to complete our projects. You might also like to consult the entry for martyr.