Jesus is the way, the truth, and the life. No one comes to the Father except through him!
But.... I hear that book end too many times.
... if God is love, why would he condemn anyone? Answer: Love without justice is not real love. It's a mockery.
... If God really wanted everyone to be saved, couldn't He just make it so? Answer: Love without choice is not real love. It's mechanistic. God didn't create robots.
... Why can't there be more than one way to heaven? Answer: Truth is not subjective! I will die one day. That is a fact I cannot change just because I want to.
... Doesn't God just want me to be happy? Answer: Happiness is a fleeting feeling. Happiness is too shallow. Your purpose is much deeper than that.
... what about those who don't get a chance to hear about God or those who don't have the capacity to choose: like the mentally ill and really young children and babies?
There's the biggest one, right there. What about someone who has never heard of Jesus? What about stillborns? Are they going to hell because they never had a chance to hear about Jesus?
Oh, ye of little faith!
Don't you think God, in His great wisdom, doesn't know innocence from guilt? The Bible actually says that God's foolishness is wiser than our wisest! I love that! Just think, God can be foolish sometimes. And His level of foolishness makes our wisest moments look like child scribbles! He alone knows the heart of all men. Women and children are included in that. Truly it is a matter between God and each person individually, but for the sake of answering the concern, here are some Bible verses that touch on the subject.
The wrath of God is being revealed from heaven against all the godlessness and wickedness of people, who suppress the truth by their wickedness, since what may be known about God is plain to them, because God has made it plain to them. For since the creation of the world God’s invisible qualities—his eternal power and divine nature—have been clearly seen, being understood from what has been made, so that people are without excuse. For although they knew God, they neither glorified him as God nor gave thanks to him, but their thinking became futile and their foolish hearts were darkened. Although they claimed to be wise, they became fools and exchanged the glory of the immortal God for images made to look like a mortal human being and birds and animals and reptiles.
A few notes on this passage - 1) God's existence is self-evident. (2) It should be emphasized that this passage is talking about people who "knew God, they neither glorified him as God nor gave thanks to him".
There are actually a few historical examples I can point to of this point. In the midst of Roman polytheistic mythology and Emperor worship, one Roman Emperor rose up who believed there was only one true God. Coincidence? I don't think so. Another example. In America, before the Europeans came, the Aztecs religion called for human sacrifices. Then one emperor rose up that claimed there was only one true God and did away with human sacrifice. Coincidence? I think not. Montezuma, this man's son, killed his father and brought back the old religion and the human sacrifice. It is reported his son brought the old religion back and that it was worse than before. Then the Conquistador's came and wiped them out. Coincidence? I think not.
But Romans 1:18-23 is not the only passage that sheds light on this subject. I do not believe the answer is no one is innocent. I believe ignorant innocence IS possible.
John 15:22 - If I had not come and spoken to them, they would not be guilty of sin; but now they have no excuse for their sin.
John 9:41 - Jesus said, "If you were blind, you would not be guilty of sin; but now that you claim you can see, your guilt remains."
Twice in the book of John, Jesus says that, in essence, if you were ignorant of your sin, you would not be found guilty.
So... the truly innocent... only God knows. But there is room for forgiveness for those who truly are innocent in their ignorance. That certainly includes stillborns, mentally ill, children too young to understand, and those who have not heard the name of Jesus.
Yet again, I say, Only God knows who is truly innocent. What we must do is learn to trust His judgement. For He is trustworthy! The only one who is trustworthy! Will you trust Him today?