The Insane Popes are a fictional gang from Marvel Comics, not a real-world organization.
“Crazy” Jack — ruthless, charismatic, willing to kill allies. Embodies chaotic evil.
Appear in Elektra, The Punisher, Spider-Man titles — usually as cannon fodder for anti-heroes.
Serves as a hyperbolic 1980s “urban decay” trope: visually coded menace for gritty street-level stories. No real gang uses the name or aesthetic.