Right, no, I'm not counting Revelations as a case of Infanticide, I'm saying that it's the Christian myth on equal footing to Ragnarok, except that instead of the devil figure of the religion starting it (ok, debatable), it's the father figure.
It's something more like-
| Norse | Greek | Christian
|
Infanticide | Rimtursar attempting to wipe out the Aesir | Chronus eating his children | The Flood, Sodom and Gommorah, Passover
|
World Ending Apocalypse | Ragnarok | The Sorrow of Demeter (averted) | Revelations (parable) |
Where each mythology has cases of Infanticide, and an apocalypse (Greek is notable in that their apocalyptic events tend to have "happened" in the past and either averted or recovered from... which makes a sort of sense when you consider that apocalypse is a greek word meaning to disclose knowledge).
And here's the thing- virtually every (western and near-eastern) mythology has a story about how a new generation of gods war with the older generation. Usually the new generation wins, kills or imprisons the older generation, and are worshiped by the people telling the story. But Christianity has to be all hipster about it, and so their Divine Intergenerational War story is about a third of the angels (who are definition-ally gods as they are a higher power to humans) war with their father, God, and lose.
Another point to consider when making the Hordes of Hell a sympathetic faction is that the cause of Lucifer's fall is never really specified in the Bible.
I mean, Lucifer is called proud, is said to have desired to be like God, and called a murderer, but the specific cause of the fall isn't called out. Even "seeking to be like God" doesn't really narrow things down, because the Tower of Babel is about humans "seeking to be like God" by building a giant tower, and I've been accused of similar just by asking logical questions of my mother on the subject of life on other planets like "Why would God create a people just to watch them die?" (She was thinking of life in terms of human life and its limitations) So the sin of seeking to be like God is really, really broad in Christianity and seems to come down to "not falling on your knees and sucking his divine dick."
Now, because the whole of divine texts presumed to come from God is "The Bible," Christian storytellers have come up with their own stuff, and some suggest that Lucifer fell because of a case of contradictory orders. The gist is that God first created the angels and gave them one command- "love me above all else." Then a while later, he created man, and gave his angels one command- "love man above all else." And Lucifer piped up and said, "Um, sir, which order do we follow?" and God said "GTFO you prick."
Another similar story is that when God made the angels, he commanded them to bow to him, and they did. When God made Adam, he commanded the angels bow to him, and Lucifer said, "Fuck that, man's living clay, I'm living fire. He should bow to me." And God said "GTFO you prick."
I kind of prefer the first story, since it casts God as an idiot who gives contradictory orders, and we know how full of contradictions the Bible is, so this is believable. The second story rather well enables a story about demons working against humans, because they're jealous of the lesser beings who their father loves more.
There is of course the possibility of saying that Lucifer fell for his love of man. This is more or less what Demon the Fallen did, where the angels were given some reason to have to choose who they would serve, God or man, and Lucifer and his friends chose man, because God is omnipotent and man ain't.
Really, so long as you don't decide that a being created by God specifically to be his servant rebelled because "LOL FUK U," you can ascribe the "known actions" of Lucifer to a motive of defying God, or helping man. The serpent isn't literally Satan, but most people think of it as such, and you can explain it's actions as either "Fuck God, Imma go corrupt his slaves" or "Oh man, you deserve better than being a thought slave." His persecution of Job could be "Fuck you God, I'm going to show you that man only worships you because they get cash and prizes" of "Sorry, Job, you're an acceptable loss if I can show other people how easily God abandons them." The temptation of Christ could be trying to turn God's son away from him, out of spite or to deny God a powerful ally, or to gain one for himself, or trying to save the human half of God from sacrifice. The Anti-Christ could be a warrior trying to deny his enemy a support network, or it could be Lucifer trying to save humanity from slavery.
So long as you don't give the Fallen too antagonistic a reason to rebel, you can also always cite God's many atrocities as reasons for them to fight for sympathetic reasons. Even if you start with "And Lucifer spake, 'NO U," and did fall" you can say that witnessing the Flood, where all but a single family was drowned for their sins, even those whose only sin was "reaching puberty and masturbating furiously," convinced the Fallen that God was dangerous psychopath who needed to be stopped. Or they could have seen the slaughter of the first born of Egypt and decided it, or they could have seen Sodom and decided it. Basically, even if Lucifer fell purely because he wanted to be worshiped as God's equal, there is no shortage of crimes that could turn him and his people into sympathetic enemies of The Most High.