I don't know if they would go to heaven, I'm not the decider, God is the only one with the power to save.
But it just doesn't sound right for saint-like people who don't believe to go to hell.
My way of thinking is.
Before the time of Christ, and the gospels. Before the Bible, and before anyone could really hear of God (Some tribes today haven't heard of God). How would those people be judged? Most people like the think everyone in the old times were savages, eating people's hearts and killing without sense. But I believe they were much like us, they had their depraved, evil people, as we have ours.
But they also had their great loving people, who would help someone in need. We wouldn't have grown as a species if this wasn't true.
My point being, how would the good people back then before the word of God. Who truly and honestly did good things, and hated to do bad things. How would they be judged?
Now you open the proverbial can of worms.
Ask a more basic question. Why are we here?
G-d in his word declares that he is HOLY that in him there is no sin or malice..... So, how is it that a loving, perfect G-d would allow those who have never heard of him, heard of Yeshua (messiah) never heard of the bible, the gospel or anything like that, be condemned? Hos is that just, loving and perfect???
The answer is alluded to in scripture. In short, why was mankind created in this freak show? A place fraught with sin, disease, corruption and death?
Revelation 12: 3 Then another sign appeared in heaven: and behold, a great red dragon having seven heads and ten horns, and on his heads
were seven diadems. 4 And his tail *swept away a third of the stars of heaven and threw them to the earth.
And again we see it in Reve 12: 7 And there was war in heaven, Michael and his angels waging war with the dragon. The dragon and his angels waged war, 8 and they were not strong enough, and there was no longer a place found for them in heaven. 9 And the great dragon was thrown down, the serpent of old who is called the devil and Satan, who deceives the whole world; he was thrown down to the earth, and his angels were thrown down with him.
So what can we glean from this? Well, there was a war and any war against G-d is REBELLION. Where were these "angles" cast down to? THE EARTH. No some try and teach that these angles are demon's and some of may be. BUT what is key to understand is that the Fall of man in Genesis and this event in Revelation 12 ARE THE SAME.
The physical is a TYPE of the spiritual. We hear right after this it proclaimed that: 10 Then I heard a loud voice in heaven, saying,“Now the salvation, and the power, and the kingdom of our God and the authority of His Christ have come, for the accuser of our brethren has been thrown down, he who accuses them before our God day and night.
It explains so much..... It explains why man is BORN at war with G-d it explains why we are born with a rebellious nature. It explains why you were born where and when you were born. Depending on your role in the rebellion in heaven determined where and when you were born. After all being born at a random time and circumstance is not FAIR nor is it JUST.
G-d gave us over to our rebelliousness and in his infinite, unmeasurable mercy he provide a way back.
Think about it... any other answer puts G-d in the position of creating man and woman who were without sin in a postion where they are assured to eventually fail. That is perversion not love.... however, if we took part in a heavenly rebellion and he offered a way by which relationship could be restored that is mercy.