Experts say the spread of ‘tawhid’ needs to be monitored as radicals exploiting the concept seek to change how locals have traditionally practised Islam in a multi-religious society. Sri Lankan-born Rohan Gunaratna, professor of security studies at Singapore’s NTU, said he first became aware of the rise of a fundamentalist form of tawhid preaching in his home country in 2010. He said the governments of Sri Lanka and India should take immediate steps to push back against such exclusive and extremist trends.