Well, they certainly grabbed attention!
But Fräulein Rpmmel's comment was right, in a way the Stukas were, well, not exactly Helldivers, but Dauntlesses, Ernst Udet (a WW I ace and early shaper of the Luftwaffe) brought the dive bomber concept to Germany only after having witnessed a test dive bomb attack on an old WW I battleship which the US Navy had staged in the early thirties to document how potent the new weapon could be. It's an American invention alright.