In the area of "politically motivated crimes (PMK) on the left", the increase was particularly high at 172%, specifically 109 offenses (2023: 40). Experts view this with concern. "With Israel-related anti-Semitism, one topic has simply become much more prominent in the left-wing extremist scene since October 2023," explains extremism expert Hans-Jakob Schindler, Director of the Counter Extremism Project in Berlin, in an interview with Ippen.Media's Münchner Merkur. Although this form of anti-Semitism has always existed in some left-wing extremist circles, "it has become the dominant theme at times since October 2023." Meanwhile, the number of violent crimes committed by right-wing extremists has risen. Experts like Schindler have been observing this phenomenon for some time. "The propensity for violence in the right-wing extremist scene is increasing significantly," says Schindler.

The group shares the name of the John Brown Gun Club, which is listed as a “leftist gun-rights group originally based in Kansas” by US NGO The Counter Extremism Project.

The John Brown Gun Club is a leftist group that originally “sought to militarize the white working class and spur it toward a social-justice revolution,” according to the Counter Extremism Project. Although the club claims to simply act as armed security at protests, local chapters have often been associated with other left-wing militant groups like Antifa and have been involved in violent attacks.

The Counter Extremism Project describes the Animal Liberation Front as "a far-left extremist group focused on animal rights" that was formed in the 1970s in the United Kingdom. It now operates in 40 countries and has "claimed responsibility for arson and vandalism against animal research facilities, farms, restaurants, and other businesses," the group says.

"The group emerged in England in 1987 from the skinhead music scene, according to The Counter Extremism Project (CEP), a non-profit policy organisation working to combat extremist ideologies.

Founded by Ian Stuart Donaldson, who died in a 1993 car crash, it has since spread across Europe, Russia, Australia, and North America, the CEP noted."

“In 2023, Florida Attorney General Ashley Moody took action against pro-abortion activists Caleb Freestone, Amber Marie Smith-Stewart, Annarella Rivera, and Gabriella Victoria Oropesa, who vandalized a pregnancy center. According to an article by Life News, the activists spray-painted the following message on the pregnancy center's buildings: “If abortions aren’t safe, neither are you.” The vandals are affiliated with a group called “Jane’s Revenge,” which has “claimed responsibility for acts of vandalism and firebombings of anti-abortion offices and clinics,” according to the Counter Extremism Project.”

"The Counter Extremism Project, which maintains databases on extremist and terrorist groups around the world, calls Jane’s Revenge a “militant pro-abortion rights group” and says the group has claimed responsibility for arson and vandalism across the country."