That fear of female fighters, and the idea they were more dangerous than men weren't just Nazis' invention but seems were popular in Europe including Poland although I really don't know why.
The image of the "Flintenweiber", lit. "musket women", originated in 1919 among the German Freikorps who went to Latvia to fight the Bolsheviks there. There were many women among the Bolshevik fighters, a lot of them Jewish, something that the Freikorps men found unusual and perverse.
Captured "Flintenweiber" were usually executed on the spot. The fear and loathing of the female fighters is very evident in the memoirs left by Freikorps men such as Ernst von Salomon.
For example, Erich Balla, in his memoir "Landsknechte wurden wir", gave this description of executions of young female Communists during the capture of Riga in May 1919:
The anger of the [Baltic Germans] now rampaged through the streets of Riga. It is horrible to admit this, but it was mostly directed against young women between the ages of 16 and 20. These were the so-called "Flintenweiber", mostly beautiful things......who spent their nights in sexual orgies and their days in orgies of violence.......The Baltic Germans showed no mercy. they did not see their youth or their charm. They saw only the face of the devil and hit, shot, stabbed them dead (schlugen, schossen, stachen) whenever they saw them. four hundred Flintenweiber lay on the streets of Riga in polls of their own blood. The hobnailed boots of the German Freikorps marched calmly over the corpses.
Quoted from the book "The Impossible Frontier: Germany and the East, 1914-1922", by Annemarie Sammartino, page 58.
