While the SPLC does list many neo-Nazi and far-right organizations and movements across North America, it has largely neglected far-left extremism, with no mention of extremist groups like Antifa on their “hate lists.”
On their website, the SPLC answered why they don’t consider Antifa a “hate group” saying, “The SPLC condemns violence in all its forms, including the violent acts of far-left street movements like Antifa (short for anti-fascist). But the propensity for violence, though present in many hate groups, is not among the criteria for listing.”
The SPLC also has links to other far-left “anti-hate” organizations across the globe including UK-based HOPE not Hate who also have little to say on far-left extremism.
Earlier this year the organization published the address of a private Identitarian conference which was then seen by Antifa who showed up in the area hours later causing violence. One far-left extremist was arrested by police after attacking a conference attendee.