The term "society" is a sum total of a groups learned knowledge. It equals human survival. This triumph of learning over instinct is precisely what the human species evolved to specialize in.
No, humans evolved to live in groups. "Society" is all the extraneous, non-natural stuff people have added to make these groups work in a way not ruled by base instincts.
The supremacism of cisgender heterosexuality is mostly modern, achieving totalitarianism in Western cultures mainly around the 1800s.
That is not entirely true. Ancient Greeks and Romans viewed being penetrated as being a woman's role and forbade "real men" from engaging in such activities under great societal pressure (even to the point of viewing a man performing oral sex on a woman as wrong). The Aztecs, despite having a god of male homosexuality, made homosexuality a capitol offense--as I mentioned earlier, I've read it's because gay couples don't produce new taxpayers--but they also put men captured in battle but who weren't sacrificed in the same category as gay men as being "lesser."
In addition, in many cultures, third genders were assigned to people were intersex or who didn't fit societal roles properly, like an "effeminate man," not necessarily because they are what we would call transgender or non-binary. I'm sure many of them
were transgender or nonbinary, of course, but it's doubtful all of them were.
There are many people who are proud of their body. Many people who are proud of their gender. Many people who are proud of being a member of a man/woman/nonbinary community. In this same way, there are many people who are proud of being gay and proud of being trans, and so on.
Yes, and again, this is still because historically (and it doesn't matter if you're counting two centuries or two millennia here), people have been oppressed for being "wrong" no longer have to be ashamed of who they are.
If you have a fantasy race in a fantasy world that doesn't have a history of oppression,
why would they be proud of their sexuality? It's completely normal. It's like being proud for having two hands when barring accidents, every member of your species has two hands.
You want some dwarf pride? Give them Beardless Pride month. Because traditionally, in games, real dwarfs have beards (
I am of the opinion that this includes the women). There's been stuff written in various D&D books and in Dragon over the years talking about how shameful it is to not have a beard, and that it's even common to cut the beards off of dwarf criminals.
You want a dwarf code, so that dwarfs can let other dwarfs know who and what they're into without having to be rude enough to say it out loud (assuming dwarfs think talking about one's sex life is rude), then do it with gemstones.
If you actually want dwarfs, or elves, or orcs, or whatever, to have pride in a gender identity or orientation without having a history of oppression, then you need to have a reason for it beyond "it's what real-life humans do" to have it make sense in a gaming world. Maybe the creator god made special material to make male dwarfs, and special material to make female dwarfs (gold and silver, stone and fire, whatever), and instead of getting rid of the bits that were left over or treating them as worthless, the creator combined saw there was something special about them and use them to create an alloy; in modern terms, trans/non-binary/intersex dwarfs are seen as a representation of that alloy who were made special.
Not every American is "extremely proud" or "very proud" of being an American − but the majority is; about 65% feel heightened pride in their shared identity.
I really don't know what nationalistic jingoism has to do with anything.