I think gender fluidity is an interesting concept, less cringeworthy than other things. What does the bible have to say about it? It doesn't because its a newly formed concept. Surely people should be allowed to not be judged by the physical flesh they live in. I'm not a homophobe like it appears some uneducated people on this thread are, although it doesn't mean I agree with it. I think it is better to be accepting of people rather than to suppress them.
Suppression is an evil in itself. How can you bring people into the light if you suppress them, and unwittingly push them into dark places, and into the wrong hands, and the wrong crowd. There are gays and there are gays, just like there are straight people and straight people, both capable of wicked things.
However it is easy for a Christian to scapegoat that which the bible appears to 'allow them' to. Of course forget about Jesus talking about love, forget about that one. Even the majority of Muslims are peaceful, but those who are not, or those that come from deprived nations (not real Muslims), do the same thing, they take context out of their holy book and use it for their own agenda 'against the wicked'. Often when people do that, they themselves are wicked. And it is wicked because it is without love, to be against 'an enemy'. Just like people might talk here. Say something loving for a change.