Mu'ath Al Kassasbeh was taken captive by IS when his fighter jet crashed in Syria in late December.
Images of his apparent murder have been circulated by IS supporters on Twitter.
They show a man in a cage with a line of fuel leading to him.
The fuel is then lit and the cage bursts into flames.
Islamic State has become synonymous with viciousness - beheadings, crucifixions, stonings, massacres, burying victims alive and religious and ethnic cleansing.
While such savagery might seem senseless to the vast majority of civilised human beings, for IS it is a rational choice. It is a conscious decision to terrorise enemies and impress and co-opt new recruits.
IS adheres to a doctrine of total war without limits and constraints - no such thing, for instance, as arbitration or compromise when it comes to settling disputes with even Sunni Islamist rivals. Unlike its parent organisation, al-Qaeda, IS pays no lip service to theology to justify its crimes.
...
Conscious of the importance of winning hearts and minds, Bin Laden sold his message to Muslims and even Americans as self-defence, not aggression.
This kind of justification, however, carries no weight with IS leader Abu Bakr al-Baghdadi, who cannot care less what the world thinks of his blood-letting.
In fact, he and his cohorts revel in displaying barbarity and coming across as savage.
In contrast to the first two waves, IS actually stresses violent action over theology and theory, and has produced no repertoire of ideas to sustain and nourish its social base. It is a killing machine powered by blood and iron.