Why are all my customers who bring up politics from the same demographic group?

But people who illogically assume that any particular municipal regulation that they don’t like must be directly attributable to a Democratic leader, and that the obvious remedy to the existence of this one objectionable regulation is to get that Democratic leader out of office entirely, do overwhelmingly tend to be conservatives.

What I’m surprised at in the OP’s anecdote is that the griper’s response to the spray paint being locked up was to complain about the legislation. I would have expected the griping to be more about “those” “hoodlums” who spray paint graffiti on other people’s property so that “we” have to keep the spray paints locked up.