I think one of the issues with being Gender fluid is then the struggle to try and port it onto existing norms like being male or female. Surely there's a better way to deal with this than having two names and switching between genders as if it is black and white.
I'd also agree that it's one thing to want to examine mental health disorders and the roll they play in these issues and it is another to just point and declare they must be mentally ill!
Genderfluid generally don't switch between genders as such, it's more of a scale to them. Some days, they feel more one than the other, and will put on clothes that match how they feel that particular day. Having two names isn't the norm, though some do. Based on those I've read about or talked to, I didn't get the impression that they'd react with hostility to being called the wrong name or addressed with the wrong pronouns, at least not as long as there was no malicious intent. By and large, I think the best solution is to treat them with dignity and respect, same as everyone else.
As for mental health issues, gender dysphoria is not a disorder, and if a trans person suffers from a disorder, it's unlikely to be a result of (or the cause for) them being trans. As for gender dysphoria itself, the best and most effective treatment is acceptance and being allowed to transition and be who they are.
And neither do you it seems.
I can comfortably say that I know a lot more than you.
One of the biggest issues about gender fluidity is the fact that most of the time it's driven by autogynephilia, just look at the Jessica Yaniv case in Canada where self identification laws mean these individuals get protection when they walk into beauty salons and demand their balls get waxed because the salon offers Women's waxing services. This means most trans girls are subjected and tared with a brush because Malcolm likes to stick a dress on and visit the girls changing rooms. Protection is in place to distinguish real gender dysphoria from being a perverse fetish and those safe guards need to remain in place otherwise we open a can of worms. A world where a guy on a stag do wearing a wig and getting into a fight can claim a hate crime because at that moment he was identifying as a woman!
Trans protection and equality should be afforded to those who are seeking medical intervention only to help with dysphoria, not those suffering from liking to have a quick hand shank in the ladies wearing a pair of tights.
https://www.theguardian.com/commentisfree/2019/jul/27/male-genitalia-week-in-patriarchy-women
Gender dysphoria and being trans are two different things. It's perfectly possible for someone to be trans with out suffering from gender dysphoria (though most who are trans suffer from it at some point). For some it goes away with transitioning, others continue to struggle with it. A lot of it has to do with their ability to reach their goals, so to speak (one girl I know struggled a lot because the hormones had little to no effect on the size of her breasts, meaning she would need surgery to get reach her goal). The feedback they receive from the wider society also plays a role. The better you pass for a member of your gender, the more likely you are to be treated as such, and the less likely you are to receive negative comments.
As for the bolded part: Are you fecking kidding me? Firstly, autogynephilia is a diagnosis invented by a self-important asshat, whose views on transgenders are not shared by the wider scientific community. Secondly, suggesting that the majority that identify as genderfluid do so because they fetishise women to the point of wanting to be one is fecking moronic, and incredibly fecking insulting. The studies that exist suggests that the proportion of men to women identifying as such is roughly equal, so it's nigh on impossible for it to be driven by "autogynephilia" most of the time.
The suggestion that we have a problem with men claiming to be women to creep in women's toilets or changing rooms is (aside from being transphobes' go-to argument for denying trans persons their rights) moronic, and not supported by statistics. In the twelve US states where trans rights are protected (meaning, you know, that they are entitled to use restrooms corresponding to the gender they identify as), there hasn't been a single reported instance of that occurring. It's akin to arguing against believing women who accuse men of sexual harassment, because they might be lying to hurt/punish said men.
As for cis pretending to be trans to do something illegal/get away with having done or said something despicable or illegal, I don't think there's a perfect solution. I know that making life harder for trans persons is not it, though.