The key word is “fanatic.” All it requires is fanatics who believe you must suffer if you aren’t one of them. The motivation, whether religion, political ideology, gangs or love of a sports team, is irrelevant.
fanatic n. One having excessive zeal for and irrational attachment to a cause or position.
Sounds like Amanpour.
The real issue is what are the "positions", the objects of pursuit for each religions "true believer." For a Christian it is "...love your enemies, and pray for those who persecute you in order than you may be sons of your Father who is in heaven." (Matthew 5:44,45). For a Muslim it is "...slay the idolaters wherever you find them, and take them captive, and besiege them, and prepare for them each [an] ambush." (Qur'an 9:5)