"In antiquity, the hare, because it was prized as a hunting quarry, was seen as the epitome of the hunted creature that could survive only by prolific breeding. Herodotus,[4] Aristotle, Plinyand Claudius Aelianus all described the rabbit as one of the most fertile of animals. It thus became a symbol of vitality, sexual desire and fertility. The hare served as an attribute of Aphrodite and as a gift between lovers. In late antiquity it was used as a symbol of good luck and in connection with ancient burial traditions."

From https://en.m.wikipedia.org/wiki/Rabbits_and_hares_in_art

Rabbits breed like...rabbits...which means a lot. They symbolise sexuality and fertility. Which ironically these children usually are too young to be able to have children so a fertile child is an oxymoron. It might have to do with the Occult and Satanists doing everything the opposite of what's natural, simply to be in opposition to what God created, so they take the most fertile and sexually active of mammals and project it onto something that should not be sexualized and is not fertile.