Good question. A believer will always find a way to rationalize anything that happens.
Assuming that there are gods and devils is the biggest assumption one can make. Assuming that they fit your religious conception might be the second biggest assumption. To each his own. There are Egyptian hieroglyphs dating from ~3000 BCE. Might as well assume that somewhere in the cosmos there are gods/goddesses with cat heads from that writing. It's older than anything in the bible.
Religion is kind of like a buffet... people pick and choose what appeals to them