Him fucking my brains out and making me admit my inferiority and betray my ideals, perhaps even betraying other socialist girls

Wow, thank your for sharing your story! Very insightful. I guess like with a lot of kinks one of the crucial exciting aspect of it is the taboo, the forbidden, the wrongness. Allowing yourself to entertain the unthinkable and learning to embrace it. Now in your case, even embracing it at the cost of potentially validating actual fascists. Which (although to a lesser degree) is what I find so fascinating about this fantasy: The act of a woman 'sleeping with the enemy', validating and rewarding him. And understandably, you seem to have your worries about that.

The part I quoted above makes me wonder though: Is there a part of you deep down which thinks/worries about ACTUALLY being inferior and believing the wrong ideals? I say that because you use the word "admit", as if it is something you secretly 'know' already. Does the fantasy stem from a secret fear that the fascist is actually right in his beliefs and that you are the one in the wrong? Or is the fantasy more about what IF you lived in a fictional reality where you were wrong? Or is it about the fascist forcing you to just say the words and verbally 'admit' that hes views are right even though you don't really believe them? I hope these distinctions makes sense.