Which side of the political spectrum is more prone to violent extremism in the US?

Checked on September 24, 2025
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1. Summary of the results

The analyses provided suggest that right-wing extremist violence is more frequent and deadly than left-wing violence in the US [1]. This contradicts claims that radical left-wing groups are responsible for the majority of political violence. A study comparing political violence by left-wing, right-wing, and Islamist extremists in the US and worldwide found that radical acts perpetrated by individuals associated with left-wing causes are less likely to be violent [2]. However, Islamist extremists are more likely to engage in violent acts globally [2]. Data on politically motivated terrorism in the US shows that right-wing terrorists account for 11% of murders, while left-wing terrorists account for 2% [3]. The majority of murders, 87%, are attributed to Islamist terrorists, largely due to the 9/11 attacks [3].

2. Missing context/alternative viewpoints

Some analyses highlight the need for a nuanced understanding of left-wing extremism, noting that the term 'antifa' refers to a broad ideology rather than a specific group [4]. This complicates the discussion of left-wing extremism and suggests that not all left-wing groups or individuals should be associated with violent extremism. The rise of white supremacist and accelerationist movements is also discussed as a significant concern in the context of domestic extremism [5]. Additionally, the designation of antifa as a domestic terror organization is mentioned, which may impact how left-wing extremism is perceived and addressed [4]. The context of Charlie Kirk's assassination and its implications for the discussion of political violence is also relevant [6] [7].

3. Potential misinformation/bias in the original statement

The original statement may be influenced by misinformation or bias if it suggests that the left is more prone to violent extremism without considering the data and analyses that indicate right-wing extremist violence is more frequent and deadly [1]. This framing may benefit those who seek to downplay the threat of right-wing extremism or shift focus away from addressing the root causes of right-wing violence. On the other hand, left-wing groups and individuals may be unfairly targeted or stigmatized if the discussion of political violence is not nuanced and based on evidence [6] [4]. Politicians and policymakers may also benefit from a nuanced understanding of the data and analyses to inform their decisions and actions regarding political extremism [6] [5].

Want to dive deeper?
What are the most common ideologies associated with violent extremism in the US?
How do law enforcement agencies track and classify domestic extremist groups?
Which US political events have been linked to violent extremist activities since 2020?
How does the FBI define and investigate domestic terrorism cases?
Are there any notable differences in violent extremism trends between the 2020 and 2024 US elections?