They actually believe there is a difference between "cis" men and the trans identified men. They think this distinction is some fact, and not the ideological hogwash it is.
Once that white, hetro cis man puts on a wig and skirt and says he identifies as a woman, he becomes marginalized and now he can leer at women and girls in female locker rooms.
They refuse to make the very clear distinction between actual gender dysphoria and people who have transitioned and men with a sexual fetish. And they are VERY different.
But they make a false distinction between "cis" and "trans" that is rooted in ideology.
So THEY think this makes sense. It doesnt though and they are unwilling to see the issues and holes in their beliefs. Even as it harms women and girls and puts us in danger.