Fanaticism (noun)

Excessive and unreasonable zeal or devotion to a particular cause, idea, or group, often to the point of intolerance.

Origin:

From latin fanaticus, meaning 'inspired by a deity'.

Examples:

1. The cult's leader promoted fanaticism among his followers, insisting that his way was the only way.
2. The politician's speeches were filled with fanaticism, as he railed against his opponents and their beliefs.
3. The football team's fans were known for their fanaticism, as they would stop at nothing to support their team.
4. The young woman's fanaticism for the musician led her to collect every album and attend every concert.
5. The extreme fanaticism of the extremist group was a major concern for the government, as it threatened the stability of the nation.