I'm thinking of bringing my baby to my friend's daughter's funeral
How old is your baby?
Still young, but growing up pretty fast
If at all possible, you should try not to bring a baby to a funeral. This is a solemn, sad affair, and having a baby might be distracting or irritating to people who are already grieving.
I don't see any harm in bringing my baby to the funeral. They won't remember the sad stuff.
It's not really about them seeing sad things. Your baby could cry because of various reasons and disrupt the service.