the.com/zealotry

means Excessive, uncompromising fervor for a cause or belief, especially the kind that tips into fanaticism and won't tolerate doubt.

from Traces back to the Zealots, a fiercely nationalist faction in first-century Judea who violently resisted Roman rule — their name came from Greek 'zelos,' meaning ardent passion or jealous zeal. The word passed through Latin into English, and over time 'zealot' broadened from that specific historical group into a general label for anyone burning a little too hot for their cause. 'Zealotry' tacks on the suffix to name the condition itself — zeal curdled into a pattern of behavior.