extremist

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extremist

a person who favours or resorts to immoderate, uncompromising, or fanatical methods or behaviour, esp in being politically radical
References in periodicals archive ?
aAlbanian government is determined in its efforts to prevent and combat violent extremism, terrorism and all related crimes.
aCombating terrorism and violent extremism cannot be done without full support and participation of judicial institutions in the process.
One does not have to look far to be reminded that the most feared form of extremism among Americans today is that of radical Islamists.