As a bloc they are also younger, so there's overlap with the underrepresentation of that bloc. Will take a few cycles to become more representative.
Surprised more people aren’t citing this as an answer. Irreligiosity at least in the US is generally a
Millennial/Gen Z phenomenon. Likewise I contend irreligious
underrepresentation is not the concern but rather
Judeo-Christian overrepresentation. At the very least I want a Senate Majority Leader who doesn’t openly cite the Torah to justify Israeli settlements.
I'm thinking primarily of associating staunch atheism solely with upper-middle-class white STEMbro culture, but as RINO Tom observes, staunch atheism is not really representative of the so-called "nones" anyway, regardless of the other problems with the stereotype.
Implying terminally online religious lefties aren’t all white UMC bohemians lmfaoooooooooo
