Captain America and Superman are Jewish responses to the Nazi idea of the ubermensch that ask different, but equally compelling questions in response to it. Captain America asks "what if the ubermensch was real, and he loved Jews?" and Superman asks "what if the ubermensch was real, and he was a Jew?"
And the Jew in question is Bucky Barnes
the question Bucky's character asks is "what if the ubermensch was gay, and he railed me?" this is a third, equally important, question
Honestly devastated to see people reblogging the original post, which was a set up for this gag, without the punchline.