There's only two genders.

We're living in an age of such entitled narcissism that people desperately want to conflate individuality with biological distinctiveness. They've dyed their hair, they've got the tats, they've got the piercings and yet the world still isn't noticing them. What else can they do to demand that the world acknowledges their uniqueness? Well, they can be so unique as to deserve their own gender. That's top trumps for biological distinctiveness.

There are two genders. This is a biological fact. That individuals may deviate from them does not mean we send them to the gulag or the concentration camps, it simply means there are biological norms.

Human beings have two eyes. If someone is born with one or three (or even born with two but identifies as a three eyed person), this does not result in a new biologically distinct life-form -- it results in a deviation from the biological norm. That doesn't mean we hate them or want to stop them from working in the local green grocers. It simply means that there are deviations from the norm.

The zealous ideology that we must create a society where every single unique individual is scientifically recognised for their uniqueness is ludicrous. If you want to identify as zeeba and reject the biological norm of your existence, that's fine (no-one's stopping you) but please... for the love of God, do not expect (or demand) that the rest of society adhere to that identity lest it be branded hateful and bigoted.

Your individuality is not the same as biological distinctiveness.

Anyone who says otherwise does not understand (and is a threat to) science.