Dude, that doesn't even make sense. No one was suggesting that body parts have belief. That's not in context, doesn't make sense is and isn't something that's even been suggested. It has nothing to do with the fact that babies, lacking belief in god, are atheists.
Seriously, I don't think you've ever learned how to construct a logically valid argument using critical thinking with supporting facts and evidence.
lol. So, how do you differentiate between the plants lack of belief in God and the body parts lack of belief in God?