Addressing the first World Sufi Forum, Modi in an oblique reference to Pakistan said while some are trained in organised camps, there are others who "find their inspiration" in cyber space.
"There are forces and groups that are instruments of state policy and design. There are others recruited to the cause in misguided belief.
"There are some who are trained in organised camps. There are those who find their inspiration in the borderless world of cyber space. Terrorism uses diverse motivations and causes, none of which can be justified," he said at the Forum convened by the All India Ulama and Mashaikh Board to discuss the role of Sufism in countering rising global terror.
"Terrorists distort a religion whose cause they profess to support. They kill and destroy more in their own land and among their own people than they do elsewhere. And, they are putting entire regions to peril and making the world more insecure and violent," he said.
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Strongly emphasising on rejecting de-linking terrorism and
religion, Modi termed as "anti-religious" those who spread terror in its name and stressed the need to advance the message of Sufism which he noted stood for principles of Islam and the highest human values.
"As I have said before, we must reject any link between terrorism and religion. Those who spread terror in the name of religion are anti-religious. And, we must advance the message of Sufism that stands for the principles of Islam and the highest human values. This is a task that states, societies, sages, scholars and families must pursue," he said.
"Parents in 100 countries live with the daily pain of their children lost to the battlefields of Syria. And, in a globally mobile world, one incident can claim citizens of many nations.
"Every year, we spend over 100 billion dollars on securing the world from terrorism, money that should have been spent on building lives of the poor. The impact cannot be fully captured in statistics alone. It is changing the way we live," he said.