P1: All humans from conception have the "sin nature"
P2: Without accepting jesus, you are destined to hell.
P3: Babies who die early do not accept jesus and thus still have the sin nature.
Conclusions: Babies go to hell.
For those who still think that babies go to heaven. If they do, then ultimately jesus' sacrifice was meaningless. If people can go to heaven without jesus then whatever jesus did was unnecessary. And God ultimately decides who goes to heaven. By this there will also be nuances that also make people go to heaven.
What about people with mental illnesses incapable of ever understanding? What about people who never heard? What about people before jesus who didn't hear? What about people forced into other religions?
If accepting Jesus' sacrifice is not a prerequisite to enter heaven, that would mean that yahweh is just searching for pawns who will worship him for eternity. And those who are incapable or unwilling will born for eternity.
Not very loving...