fanaticism          
noun [ U ] uk/fəˈnæt.ɪ.sɪ.zəm/ us/fəˈnæt̬.ɪ.sɪ.zəm/
 disapproving狂热 
extreme beliefs that may lead to unreasonable or violent behaviour
  religious fanaticism 宗教狂热 
 Fanaticism has already destroyed countless lives. 狂热已毁了无数的命。 
  informal狂热 
extreme interest in something, to a degree that some people find unreasonable
  the fanaticism of football fans 足球迷的狂热 
 His fitness fanaticism sets him apart from his friends. 他对健身的狂热使他显得与他的朋友很不同。 
 See: fanatical
 - More examples
 - They urge young people to stay away from all forms of fanaticism and extremism.
 - Ideological fanaticism fuels their anger.
 - Fanaticism and terrorism have no place in religion.