Chicago has a lot of black people (and just people in general) and a lot of guns so when someone is shot there it's somehow justification for how other places (with less black people) have gun violence too and that it means regulating guns is pointless.
Chicago isn't supposed to have a gun problem because gun regulations are stronger there but when you can go next door to another state with much more lax gun laws and get it there it doesn't do much good.
The logic is baffling and a distraction though.