the "JK Rowling's Pussy" joke is like when some GOP guy gets caught being secretly gay and all the kind and empathetic ppl who hate homophobia are like "haha this big poofter is gonna get his bussy prolapsed as hell when he bends over in the prison shower"
threw together like 30 seconds to make a point that ww2 was about industrial might and imprecision in a way no other war was. Major battles were throwing hundreds of thousands of tons of ordinance down range and hoping you didnt randomly explode