The words “extreme”,”extremist” and “extremism” carry so many connotations these days – far more than a basic dictionary definition could ever cover. Most would agree that Islamic State, the London Bridge and Manchester Arena attackers, as well as certain “hate preachers” are extremists. But what about Darren Osbourne who attacked the Finsbury Park Mosque? Or Thomas Mair who murdered Labour MP Jo Cox? Or even certain media outlets and public figures who thrive on stirring up hatred between people? Their acts are hateful and ideologically-driven, but calls for them to be described in the same terms as Islamic extremists are more open to debate.