A reader writes:
So, you recommend that one should get in the face of these weirdos and be a relentless asshole? Better recommendation: ignore them.
Another writes:
An effective retort, but credit where it's due; it's a line from an old Zach Galifianakis bit.
Another:
Galifianakis' uncle, Nick, ran for Senate against Jesse Helms in 1972. Helms' campaign motto was "Vote for Jesse: He's One of Us" (i.e. not Greek). Zach talks about it here.