Zealotry n. The character and behavior of a zealot; excess of zeal; fanatical devotion to a cause. "Enthusiasm, visionariness, seems the tendency of the German; zeal, zealotry, of the English; fanaticism, of the French."
... be regarded as objects of idolatry—that is to say, become in themselves objects of worship instead of being recognised as mere symbols: a process which unless conducted with the most studied moderation and caution was absolutely certain to give the rein not only to passionate zealotry but to wanton irreverence. Cranmer obtained an order for the reading in churches of the "Book of Homilies," for the most part in lieu of all other preaching. The Paraphrase of Erasmus, done into English, was ordered ... — England Under the Tudors • Arthur D. Innes