According to t
he Christian doctrine of original sin, all babies are born sinful. No one gets a free pass regarding sin.
A typical sinner. Notice the carefree, unrepentant expression?
We've already established that babies do not need to grow up and "become evil." Being human, they are (
according to Christianity) inherently evil and so deserve eternal torment in hell.
As to the the rest of your question:
Christians maintain that their god is omniscient. This means he knows all.
Choosing evil has nothing to do with salvation. In fact, one could do evil all one's life and still be (
according to Christianity) perfectly eligible for salvation.
Once again, you are advised to study the Christian doctrine of Original Sin. Babies may look as cute as a little bug's ear, but they are (
according to Christianity) undoubtedly born sinful.
1.) There is nothing in the Bible that explicitly states that babies (dead or not) are innocent and automatically worthy of heaven.
2.)
The Bible states that humanity is inherently evil because Adam and Eve ate from a magical tree after being deceived by a talking snake.
THAT IS WHY!
...
However, Christians are fairly clear on what one must do to be saved:
~ from "
What Must I Do To Be Saved?" by Robert Velarde via
Focus On The Family's website.
So it's clear. To achieve salvation, babies need to:
1.) Believe in Jesus, combining faith and trust and acting on it.
2.) Express a sincere willingness to change their sinful behavior.
Plus (and this is the clincher), they need to:
3.) Humble themselves before (and display proper deference to the authority of) God's earthly representatives.