Scott Atran in The Guardian:
How should we make sense of the Easter Sunday church and hotel bombings in Sri Lanka that killed more than 350 people and wounded 500? Now that Islamic State appears to have claimed responsibility for the attacks, the question arises: is this merely the latest symptom of an epidemic of Islamist violence, motivated by a belief in offensive jihad (“holy war”)?
The answer is complex and not necessarily in line with public perceptions. Islamist terrorism has been decreasing globally, and particularly in the west, since its peak in 2014-15 when Isis established its caliphate. In recent years, however, far-right supremacist terrorism has risen sharply, to more than one-third of terror attacks globally, even accounting for every extremist killing in the US in 2018. Yet it was more likely to be overlooked or tolerated by western polities, because of cultural history, familiarity and legal protections extended to domestic groups (such as US constitutional safeguards for freedom of speech and the right to bear arms). Thus, attacks by Muslims between 2006 and 2015 received 4.6 times more coverage in US media than other terrorist attacks (controlling for target type, fatalities, arrests).
These two violent ideologies are not separate, but work in tandem, hammering away at the political order, which is increasingly vulnerable for a number of reasons.