they would like to actually end some humans themselves, which if everyone is getting out of town, they can't andsome of the First's comments did suggest it wanted to end EVERYTHING, which means all life.
From what I gather The First's goal is simply to become corporeal on Earth, for that to happen it has to overrun the world and have a 'presence' in this dimension through the armies it imbues with its essence. '
Amends' already stated that The First is
in everything, that it existed long before man and demons themselves. I dunno, maybe its the mental projection/dream state/spooky ghost of some Cthulhu-like Old One like Illyria. *shrug*
Because its origins are 'so mysterious' and always hand-waved away its hard to nail down specifically what it wants. For all its talk its amazing how many people have different interpretations of its end goal.
Do you have any quotes suggesting that the First wants to 'end everything'?
Um, because, without anything, there is no sin/darkness within folk, so I don't see how it exists on afterwards, unless by being corporeal that need becomes moot. But really, we're all just guessing.
If you're correct and I misinterpreted The First's goal, that just makes it more boring as a villain, and it was already the most boring Big Bad in terms of end game.
Also considering how rare demons actually trying to open the Hellmouth was, I think most demons that want to kill people actually do just want to kill people, rather than destroy all of humanity
Well, there are plenty of demons who hate humans and want humanity to end, but they don't just form a doomsday cult and try and open the Hellmouth. Over on Angel there were plenty; The Scourge was one, those pilgrim-looking demons from
Happy Anniversary were another. Humanity is a plague that doesn't belong- they (demons) were here first- and so naturally they resent our presence.
Sure, there are neutral demons, and many demons that rely on humans to eat or procreate (from laying eggs in them to vampiric blood-sharing) but even then its probably going to be easier to do that
after the apocalypse, when world governments collapse and the naked monkeys start running around in a panic. Not much of an organized threat at that point.
Basically many, indeed most, demons are capable of adaption and so I don't see them investing in humanity beyond convenience food. In fact vampires probably have the most to lose, since they are that more connected, through their memories, to the human state of existence. And even then there are plenty of vampires who want the Old Ones to return.