https://psychiatryonline.org/doi/full/10.1176/appi.neuropsych.20220121
A Brain Mechanism for Hate
Taking the theories of hate and the studies on dehumanization into
consideration, hate may depend on animalistic infrahumanization with
heightened activity in the IFC facilitating disdain and disgust for
the devalued target. The absence of moral emotional engagement,
including hate, among frontolimbic brain-injured patients, such as
those with frontotemporal dementia (FTD) (13), highlights the
differential association of hate with animalistic dehumanization
rather than with mechanistic dehumanization. Although the
neuropathology of FTD is centered in the mesial frontal, anterior
insula, and anterior temporal lobe structures (14)—regions purported
to overlap with a proposed hate network (15)—patients with damage to
these structures may have prominent mechanical dehumanization and
indifference to others without the presence of hate.
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