Under the order, private businesses can choose to display signage indicating that ICE cannot enter without a warrant—thereby designating “their property as part of a city-wide network of community spaces that stand together in affirming the safety, dignity, and belonging of all of our residents,” the mayor said.
Johnson touted the order for building “a broad civic shield that limits the reach of harmful enforcement practices. It strengthens neighborhood solidarity and it reaffirms Chicago’s role as a welcoming city.”
I’m pretty sure it’s an old trope from early horror films. The villagers would arrive with torches and pitchforks to drive out the monster. This clip from Frankenstein (1931) actually has a mob with torches and clubs, but a similar clip from Bride of Frankenstein (1935) shows a mob with seemingly all kinds of tools including pitchforks and a pickaxe. (I can’t find a full clip from Bride of Frankenstein, just this quick shot in the trailer.)
A similar mob appears at the end of The Adventures of Hucklberry Finn (1939), coming for Jim.
TV Tropes has a whole section on this trope.