The coronavirus pandemic has also fuelled far-right extremism,with more extremists finding each other online amid anti-government sentiments in response to lockdowns.
Appearing before a parliamentary inquiry on Tuesday,ASIO Deputy Director-General Heather Cook confirmed right-wing violent extremism now accounted for between 30 and 40 per cent of its current caseload in counter-terrorism work. This compared to between 10 and 15 per cent prior to 2016.
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"There's always a combination of factors which contribute to an attraction to a particular ideology at a particular point in time,"she said.
"Some of the circumstances of COVID have contributed to an increase in radicalisation,in particular because of the amount of time individuals are spending in isolation or working from home or not in school I suppose,working remotely,the amount of time individuals are spending online.
"I think it[the pandemic] also makes it much easier to be finding like-minded individuals,there is a much wider variety of what I would call chat groups or areas where individuals with these views can coalesce and discuss and I guess promote these views more widely."
Ms Cook said anti-government sentiment being expressed around the world in response to lockdowns and other public health measures was"amplifying some of the extreme views",while speculation about the origins of COVID-19 was fuelling racist views.