I'll give it a shot.
Not only are "trans-women" truly women....they're the only women.
The only true women are biologically male who identify as women and only true men are biologically women who identify as men.
(I tried to give a rationale for it, but the more I tried to come up with a rationale, the more it started to sound like something a leftist would actually believe because I started invoking words like "Cisgender" and then realized just leaving that statement as is, is more sufficient and crazy sounding than explaining it)
"Only in death are all equal, and therefore, the goal of Leftism is to kill as many as possible, as quickly as possible." MIGHT be a bit too far out there for even Reddit to unironically support. It is a valid "leftist belief", though, as it is a natural consequence and flow of intersectional communism and the race to the bottom. Someone recognizing that the living have literal lived experience privileges is all it takes.