India's Permanent Representative to the UN Syed Akbaruddin also voiced concern over the "targeted propaganda of hatred" on such platforms which were created to bring people together.
Given the misuse of social media "to disastrous effect by terrorist groups", there is a need to monitor social media carefully with due safeguards for respecting freedom of expression, he said at the UN Security Council open debate on 'Countering the Narratives and Ideologies of Terrorism'.
Akbaruddin said the rise of ISIS, which is drawing foreign terrorist fighters, a majority of them being males between mid-teens and mid-twenties from vastly varying ethnicities and economic status, is a sign of the immense complexities of the push and pull factors involved.
"Radicalisation can be prevented only if the youth develop stakes in their mainstream socio-political and economic milieu. Taking long-term care of the de-radicalised is also an important aspect in convincing the possible recruits of alternatives available to them," he said.
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In an apparent reference to Pakistan, Afghan envoy Nazifullah Salarzai blamed the creation of the Taliban in his country in 1994 for opening the current "tragic chapter" of terrorism in the world.
Without naming Pakistan but in a strong criticism of the country, he said the Taliban came before other terrorist groups, including al-Qaeda, Al-Shabaab, Boko Haram and ISIS, and "their backers" had characterised the kind of terror the world was witnessing today, including stoning women to death, closing girls' schools and introducing suicide attacks that had brutalised Afghanistan's entire population.
Salarzai asked how the Taliban and its brutal practices had come into being whereby they knew how to drive tanks and fly jets while staging conventional warfare and capitalising on prolonged political conflict in Afghanistan.
He said the most cost-effective and easiest recruit methods stemmed from religious outfits, sloganism and preying on weaknesses emerging from a prolonged conflict.
He questioned the continued motivation to use violence through proxies to pursue political goals and said the three main causes were a negative State rivalry in the region, tensions between military and civilian control in politics and trust deficits among States that had prevented constructive dialogue.
Targeting the promoters and drivers of such policies that used violence to pursue political goals within State structures was crucial in dealing with threats of violent extremism, Salarzai said.
The differentiation between good and bad terrorists by a few actors was futile since all forms of terrorism must be condemned, he said.
Using Afghanistan as an example of how terrorists had taken advantage of a prolonged conflict, he said the world was now in dire need of reducing State rivalries and addressing trust deficits.