But you're using a tautology. I ask if you know for certain she's a feminist, and you say "she's a retard, which is the same thing as a feminist". Then I ask you why is she a retard, and you say it's because "she's a feminist".
Neither of your replies actually answers my question.
Let's try this again: What has she done to make you claim she's both a retard and a feminist?
Was it that she complained that a biological male won a women's sporting competition? That's a valid complaint with a basis in scientific fact (ie not retarded) that any biological woman could make, whether or not she's a feminist.