On January 6, one Telegram user made their channel, which was popular with the far right, private because "nameless faceless glowies are joining." Two days later, another person suggested that glowies would "float dead cop story, to redirect public attention and sympathy," referring to the death of the Capitol Police officer Brian Sicknick. […] Far-right forums are rife with racism and misogyny, so perhaps it’s no surprise that glowie derives from the language of hate.
Source: wiktionary