Left-wing terrorists are considered a different form of terrorism compared to anarchist terrorists, single-issue terrorism such as Animal Rights Violent Extremism (ARE), ethno-nationalists, separatist terrorists, religious terrorists and rightwing radicals.
However this agenda-based approach frequently used by the intelligence community may overshadow some other aspects of the risk analysis, that are essential for the early identification of new emerging threats and for the detection of early mutations of old terrorist forms.