1) Fanatical devotion 2) Fanaticism 3) Intolerance 4) Intolerance of opposing views 5) Undue or excessive zeal 1) Fanaticism 
• (n.) The character and behavior of a zealot; excess of zeal; fanatical devotion to a cause.
Zeal'ot·ry noun 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.» Coleridge. 
zealotry 1. Excessive zeal; fanaticism. 2. Excessive intolerance of opposing views. 3. Denotes zeal in excess, referring to cases where activism and ambition in relation to an ideology have become excessive to the point of being harmful to others, oneself, and one's own cause. While 'excess of zeal' may be used to refer to very common and indivi...
undue or excessive zeal; fanaticism.