"Infants dislike, may want to harm those different from themselves: study."

"Using puppets, researchers found the babies’ 'friends' liked the same food. Enemies, meanwhile, were those puppets who liked a different food. A second puppet would then help, harm or act neutrally toward the original puppets. The babies 'far preferred' the puppets that harmed the puppets with different tastes than theirs."

“One baby even planted a kiss on the puppet she liked,” the Canadian news source reported.

The little devils!