"Terrorism is rooted in radicalism and radicalism has its root in intolerance both in real world and social media," Cahyo said in a public discussion on deradicalization organized by LIPI here on Thursday.
He said religious radicalism is a form of religious interpretation that drives the followers, actively or passively, toward changing political system in a country.
Intolerance is a negative orientation or rejection by one of political and social rights of people of other groups.
Based on that definition, characteristically, radicalism has the aspiration to replace state constitution and political system and reject the political and social rights of people of other groups.
"There are four categories of radicalism and tolerance - violent radicalism, non violent radicalism, violent intolerance, and non violent intolerance," he said when speaking at a public discussion on "Breaking the Link of Terrorism. Possible?. Failure and Success in Deradicalization."
Also addressing the public debate included Director of Study Center of Religion and Democracy (PSAD) of Paramadina Ihsan Ali Fauzi and former terrorist now active in the program of deradicalization Ali Fauzi Manzi.
The country has been rocked by terrorist attacks over the past week in Depok of West Java , Surabaya of East Java and Pekanbaru of Riau, leaving score of people dead including police officers, suicide bombers and civilians.