On a second thought I shouldn’t be surprised given that the same poster implied that the Chicago Outfit made people of Asian, Russian, Jewish etc... descent.

Funniest thing is that, in that scene, it’s clear that not even Hopper’s character believes it, he’s just saying that to mock Walken’s character, passively showing his ignorance about his own heritage and, most importantly, get a quick, painless death rather than being tortured.