This study is the first known academic study on the intergroup dynamics relationship between Indonesian Marxists and jihadists. The appearance of jihadist language within the group context raised questions if the ideological motivation and group orientation between the militants is eroding and a new set of militants emerging in the Indonesian terrorist tapestry. Since 2011 an unheard of new phenomenon appeared in the militant milieu of the Indonesian radical scene: the Indonesian communist inspired terrorist. With the political sensitivity, cultural and political taboo, the political leadership, policy officials, law enforcement, intelligence services, academia, and the general public have not addressed contemporary violent Indonesian Marxist-Leninist actors. Most of the studies are instead based on historical accounts and viewed through the lenses of the 1965 Indonesian Communist Party period or set in the context of preman (gangster) or an underground fringe movement (Brown, Wilson, 2013). And although the new Indonesian Marxists are aligned with political powers of the incumbent presidential candidate, little research if any, focuses on the emergence of Marxist inspired violence and terror in Indonesia. Often, the debate quickly turns emotionally charged by either side, speaking for or against the Marxist causes. Little credible research is undertaken to study the contemporary socialist groups in Indonesia.Therefore the study by Prof. Hamdi Muluk, Dr. Mirra Noor Milla, Wahyu Cahyono M.Si, and other contributors identifies complex interrelated issues such as the role of foreign non-state actors contributing to the rise of violence and the justification for violence because of ecological disasters. A motif not normally associated with Marxist revolutionary slogans. Interwoven in the narrative, the study identifies the potent mix of Marxist ideologies, jihadist themes, and contemporary fears promoted by militant civil society groups. The study also identifies the relationship between foreign non-state/Non-Governmental Organizations (NGOs) and militants. Compelling evidence suggests the external factors and interaction with foreign inspired propaganda triggering fears of the militants contributed to the violence and eventually to the murder of a forestry concession worker, an attempted murder, and multiple arson attacks on private and governmental offices and assets, including setting fire to forest concessions as a method to negotiate, as well as agitating communal unrest. As recently as August 2014, Riau continues to experience arson and ‘anarchist provocateurs’ targeting communities. The study also shows a consistent pattern or eroding ideological delineation of belief structures replacing and blurring purist ideologies in the broader context of the Marxist struggle for regaining credibility. Within the hard, inner core of Marxist or jihadist terrorist cells, the revolutionary freedom fighter or Takfiri still continues to exist but the new Indonesian Marxists, as the case study shows, are as violent and deadly as their jihadist not-so-distant cousins and displaying a lower threshold for the use of violence. Viewed by the offenders as enemies of no difference, the process of dehumanizing the victims in the context of the Indonesian Marxists is in the early stages of the militants’ evolution. However, left unattended the movement that was responsible for the first premeditated bombing during the days of reformasi in 1998 was also the first NGO-inspired Marxist organization that was found guilty of premeditated murder in a Marxist inspired politically motivated killing in the name of the environment.