This whole debacle is about culture. The reason it's acceptable to dress up as a deamon but not as a nazi at halloween is cultural. There are deamons and depictions of the devil in many churches, the holiest of the holy places if you believe in that sort of thing. Tha's fine because they're there for a cultural and historical reason, while a deamon one a splash screen doesn't have any religious or historical reason for being there.
It is NOT the way the world works. I spent my childhood being exposed to plenty of cartoon devils on TV, both in TV commercials and in cartoons aimed at children. Devils are mascots of products; e.g., Dirt Devil vacuum cleaners. Cartoony devils are completely and utterly mainstream, and those who take offense at them are utterly out of the mainstream. Anyone who gets freaked out by a cartoon devil falls into precisely the same category as those who get freaked out by Halloween and who object to Santa Claus and the Easter Bunny as pagan idolatry.
There is no reason that anyone should pander to these folks, except as far as it might affect your bottom line, if that so happens to be your primary concern.
Not everyone grows up spending more time watching TV than participating in church. Not everyone looks at the world the same way as you do. It doesn't mean they're crazy.
You should try to see things from the other person's point of view, without necessarily agreeing or disagreeing with it.
And if you didn't know the Easter Bunny actually did originate from paganisim then you're simply uninformed. I can't explain why Western Christianity incorporates such symbols in some instances and would consider them "pagan idolatry" in others.
Did I ever say the word "crazy"? Terribly misguided is more like it. They can live in their misguided world, but that doesn't mean that the rest of us have any obligation to bend over backwards for them.
Btw, I'm quite aware that the Easter Bunny has pagan origins. Unlike you, I can also explain why some variants of Christianity coopt such symbolism and some abhor it. This has a lot to do with the continuing feud between Catholicism and some types of Protestantism. The Catholic Church a long time ago decided that it was better to "embrace and extend" the competing pagan religions rather than try to extinguish them.
Is it logical? No.
Is it the way the world works? Yes.