More than just a fan
Else clues• Ardent advocate
• Ardent proponent
• Ardent supporter
• Big fan
• Crank
• Dyed-in-the-wool partisan
• Enthusiast
• Extreme enthusiast
• Extreme one
• Extremely gung-ho person
• Extremist
• Fanatic
• Fanatical enthusiast
• Fanatical follower
• Fanatical sort
• Fanatically committed one
• Fervent sort
• Firebrand
• Gung-ho so-and-so
• Gung-ho sort
• Gung-ho type
• Hound
• Humorless sort
• Masada defender
• Person with a cause
• Proselytizer
• Radical
• Religious fanatic
• Serious fan
• Simon the ___ (one of the Apostles)
• Uncompromising partisan
• Wild-eyed one
• A fervent and even militant proponent of something