>>211833575
My theory: surrealist antinazi art took comfort in detective fiction, so a faceless gloved killer with its own sexual perversion and secrets has a special kinship with aesthetic and feeling over what you can produce if you haven't seen fascism during your Agatha Christie phase
There's a lot of surrealist elements in early ones (like Death Laid an Egg filing chickens) and some early ones are essentially near commie propaganda (They Have Changed Their Face) with things like anti industrialist or corporate espionage just as prone to show up as anti eugenics plotlines. The slashers move to the fore, but a lot of giallo being stylish nonsense I think comes straight from surrealists adopting detective fiction and other things considered degenerate trash by authorities