Why do some Christians believe that unsaved children may not go to heaven after death?

Answer 1

The Bible says you must be baptised. But some churches believe that as we can not tell wether all babies are normal when they grow up , then they will not ask god to come in their hearts. So to avoid any chance of a child who will later become mentally retarded, aned may get lost for ever. To prevent this all babysies are baptised when they are very small.

Jonab: the problem when you baptize a baby or a child has to do with free will. Free will demands that faith must be personal. Parents cannot believe God in behalf of their child. The child must believe God for himself. Therefore the baptizm of a child when he/she is not old enough to make a decision for him/herself is interfering with the child's freewill. Can anyone make a decision for the child's personal faith in God.

all children go to heaven

Answer 2

I have never heard that. Some of the older established churches believe that a child that has not been baptized will not go to Heaven after they die, but rather to limbo, which is neither here nor there. My mainstream Protestant church does not believe in limbo, nor an uncaring God that would banish the souls of any child to not go to Heaven.