“But Jesus called them unto him, and said, Suffer little children to come unto me, and forbid them not: for of such is the kingdom of God.” (Luke 18:16).
While I believe that if Jesus did not go to the cross and was not risen, we would all perish. But I believe because God loves us so much, such a possibility would have never happened. For God so loved the world. I imagine if we truly knew the depths of God it would bring us all to crumble before Him. So the love of God compelled the Son to die for us and to raise three days later to save mankind. Yes, I believe babies have the stain of sin upon their bodies from Adam, but Jesus reversed the curse of the sin of Adam because of His resurrection. Seeing this is the case, to say that babies who do not have the capacity to know of any good or evil are to be punished is monstrous at best. But then again, we are living in the last days.