Tamils experienced one of their first collective trauma when Colombos Sinhala police massacred nine Tamil civilians at the World Tamil Conference in Jaffna in 1974. Then came one of the worst acts of cultural and heritage genocide, the state-backed burning of Jaffna Public Library in 1981. The 2009 genocidal onslaught caused the third emblematic trauma. Now, the demolition of Mu'l'livaaykkaal Genocide Monument at the Jaffna University has triggered the fourth wave of trauma to the same extent, said Rev Fr Sakthivel, a prominent rights activist of Up-Country origin. He urged the Tamil political parties to unite and demand justice for the protracted genocide that has caused waves of collective trauma to the genocide affected Tamil nation.