If we follow the conception of the wolrd from a christian standpoint, earth, is where lucifer got banned Lucifer was best angel and he said to god "you're fucking drunk, that piece of shit of yours you just called man, there's no way that thing can handle anything better than I, or better than any of us (talking about angels) - fuck you, this is BS and you know it, I'm done with you and the project, who's with me?" Ok that's how him and a bunch got banned to earth, our planet, our fucking space floating rock of a spaceship https://www.neverthirsty.org/bible-studies/book-of-revelation/satan-in-a-rage/ He cannot stay in heaven (house), but he can go there, he's banned like his father told him to go live in the ~~garage~~ garden, with the two dogs he called man Needless to say he hates the fucking dogs ... So there's that And basically lucifer's relationship with humans is to make them fall to prove his point Point that he got probably right to begin with, but that's beside the point that's not what triggered god It's the fact that he challenged his authority under his roof, that's what triggered him, obviously