I just wanna just. Say something real quick, with the year ending soon.
3H is the one saying that the Nabateans were nearly all killed off.
3H is the one who has the Agarthans be the ultimate bad guys in every route and have them be defeated in some way in every route.
3H is the one saying that the Nabateans were defending themselves against power hungry humans and were the ones to restore everything power hungry humans destroyed.
3H is the one saying that the Agarthans knew that Nemesis was just a bandit who cared for nothing but power - that Nemesis was not some freedom fighter, but a genocidal tyrant.
The creators of 3H are the ones saying that the Nabateans never tried to "control" humanity, only that they ruled over them.
The creators of 3H are the ones saying that Nemesis and the Agarthans killed the Nabateans for power.
The creators of 3H are the ones saying that Rhea never tried to control humans when she made the Church of Seiros and rewrote history.
The creators of 3H are the ones that made the one route where the Nabateans are specifically targeted as enemies who "need" to be gotten rid of and the one route where you work with the Agarthans in any way the one route they explicitly say is the villain route.
There is no ambiguity in 3H that is enough for the interpretation of Nabateans being evil and the Agarthans being good to hold water. None. Both within the game itself and through the words of the creators, everything makes it clear that the Nabateans are the victims who are generally a source of good and that the Agarthans are the victimizers who are generally a source of evil.
And there is a reason that the people who insist otherwise have to lie about what the Nabateans have done in order to make them look wrong. There is a reason why they have to turn to the noncanonical spinoff game to get anything more to "back up" their claims - and why they still have to lie about what that game says anyway. There is a reason why they would rather support a group of characters who have proven themselves willing to instigate genocide against innocent people for power even when not accounting for the Nabateans, regarding the Tragedy, than say there is anything good about the Nabatean race at all. There is a reason that, in their reasonings and explanations as to why the Nabateans are evil, in their rush to say what they think should happen to the Nabateans, these people always fall back on real life, genuine racial supremacy rhetoric.
There is a reason why, even when directly told by victims of this racial supremacist rhetoric that what they're saying harkens back to racial supremacy, they continue to say the racial supremacist rhetoric - why they defend the racial supremacist rhetoric as "not being the same" because the Nabateans' race "doesn't actually exist." There is a reason why they insist that their racial supremacy rhetoric that is the exact same as every other racist's supremacy rhetoric about actual, real life races of actual, real life people is just being "taken out of context" - why they not-so-subtly imply that racial supremacy rhetoric has contexts in which they are okay to say.
At this point I'm not really going to sugarcoat it: if you see someone try to make the point that Nabateans are all evil and deserved the genocide that fell on them - or that what happened to them wasn't a genocide because they are all evil, or there totally weren't that many of them so it isn't a genocide, or there's totally more in some unseen unexplored location we just never see or hear about so it isn't a genocide - and/or that the racist, murderous, genocidal Agarthans were the good guys who "the writers failed to make look bad," despite everything directly pointing towards the opposite reading in every context of the game, know that they are almost certainly not doing so with any good intentions. They are almost certainly using the fictional nature of the Nabateans' race to use as a shield to spout racist rhetoric they know they "aren't allowed" to say about real races. This is far from the first time racists have done this regarding fictional races, and it will not be the last time either. At the absolute best, they are uncaring about how they are rationalizing rhetoric used to dehumanize real life people just to make some point about fictional characters, which is frankly not that much better.
This isn't about discourse, it isn't about whether people think Edelgard or Dimitri or Rhea or Claude or any other character did this or that, it isn't about war criminals, it isn't about theories or meta or what have you. This is about the real world rhetoric people like this slip into the fandom sphere in order to normalize it. This is about how these people set themselves up as pillars of their communities so that they can normalize this rhetoric without anyone able to stop them from doing so or stand up against them. This is about how these people silence the few who do speak against them if they're able, and set up anyone who speaks against them that they can't directly silence as "attackers," "spies," these dangerous interlopers who are trying to shut down a "safe space" for "no reason." This is about how they've been doing this for years now.
I've personally given the benefit of the doubt to others who've genuinely ignorantly done things like this before, but this is too consistent, insistent, and long-standing for it to be anything else but racism from those who peddle this rhetoric, whether due to being racist themselves or through their indifference to the topic of racism. Regardless of the whys of the matter, it had led to the 3H fandom to housing cesspits of unopposed racism that breed hostility and harassment to others; at the absolute least, the harm and danger of this mindset and everything it leads to and has already led to should be made clear