Do the Mermaids sign even know what line they're supposed to be arguing?
Maya's employer had exactly the same problem. They couldn't decide whether her views were so heinous that they couldn't possibly ever tolerate them, or that her views were of course absolutely fine, but it was her behaviour.
I think they're so far down the rabbit hole of cognitive dissonance from trans nonsense, that they can't even tell when they're not making a consistent argument, so they don't have the necessary self-awareness to try to keep it together to make themselves look better.