There were a whole lot of registered Communists in 1930. It was twelve years after the Bolshevik Revolution, and it had not yet become apparent to everyone what a really horrible idea it was.
I have a colleague whose wife’s grandmother recently passed away at 97. Commie in the 30’s. He jokingly used to call her Little Red Grandma.
Never were many Commies where I come from
Plenty yellow dogs though