You see "homeland" and apparently think about the end of history, with happy chickies, duckies, and bunnies, where nobody who matters loses out on anything and all the elves are happy.
Not at all. I have little doubt it wouldn't be easy, and that some people would die to dislodge the Orlesians from controlling the Dales, but I think the benefits outweigh the cost. Rape, killing elves as part of the chevalier initiation, mass murder, laws that criminalize killing a human in defense of an elf - it's an escape from these horrors that makes the prospect of an elven nation beneficial. At least, to people like me who think the elves deserve to be masters of their own destiny, where they aren't forced into servitude to humanity like they have been for most of a millennia.
I see "homeland" and I see an escalating cycle of violence chaining back thousands of years, where every single action anybody has ever taken can be construed as Oppression of the People - whatever that People might be. I see exclusion, because somebody has to define what the People are, and that means defining what the People are not. I see forced resettlement and violence, because there has never been a situation anywhere in the world where the borders neatly match up with the way that actual people on the ground identify.
I see the sole justification for almost every single genocide that has ever occurred in the history of Earth.
There's quite a sufficient amount of death as a result of the status quo that's already in place. Men, women, children - dead as a result of the institutionalized racism that's pervasive across the Andrastian kingdoms. Thousands were recently killed in Halamshiral alone. Putting an end to their plight is all the justification I need for pursuing a path that gives all the elves a sanctuary from this, where they can finally build a future for themselves.
Which makes most of your post - your claim that I don't understand just how awful elves have it in most of Thedas, and how good humans have it - total nonsense.
I fully understand how crappy elves have it. They are a Grade-A Downtrodden Minority. I have never denied this. So please stop throwing that in my face.
What I'm saying is that although there needs to be a solution to the problems plaguing elves as a whole, the creation of a national homeland for elves is almost undoubtedly going to make things worse. It won't give elves and humans less to fight about; it'll probably give them more to fight about. It won't reconcile elves and humans; it'll probably divide them even further. It won't result in "elven culture" being saved, because there is no one elven culture, there are multiple versions of it that are irreconcilable under an explicitly national government. (What happens to Andrastian elves, for example?) And so on, and so on.
That's primarily where you and I differ, because I don't think an elven homeland would make things worse - I think leaving the elves at the mercy of humans is going to make things worse. I think giving them a place where they can rule themselves can allow them to have the kind of life that neither the Andrastian nor Dalish elves could ever have under human rule. I don't pretend it would be some idyllic paradise, but I do know that century after century of human rule has offered nothing but the pervasive persistence of the status quo.
In fact, we have scholars in Orlais prepared to write papers about how elves are basically animals. That's completely horrific to me, and the notion of leaving the elves at the mercy of humans when there's another alternative for them is simply unacceptable to me.
Others in this thread have suggested that we should avoid real-world examples out of fear of politicizing the topic, and I'm inclined to agree. But without naming names or pointing fingers, I will say that the creation of national homelands on Earth has historically been a violent, destructive process done in the name of a nationalism that I personally think doesn't even measure up to the value of a single life, let alone the millions of lives that it's actually cost. Creating homelands for national communities has not made the people in those communities safer and more secure.
I have little doubt blood would be shed if an elven rebellion were to dislodge Orlesian control over the Dales, but I also know that it could provide a much better future than the one they would have living in dilapidated ghettos in human cities.
Obviously, then, if the creation of homelands is a stupid idea, but the current system also stinks, the current system needs to be changed somehow in order to better the condition of elves. This will not be a simple or easy process, but it can be done if the historical precedent of Earth is anything to go by, and it must be done, because both of the alternatives are horrifying.
This is where you and I continue to disagree, because I don't think the prospect of an elven homeland is stupid; I think it's a viable opportunity for the elves to have a place where they can what they never could under human rule.