The Christians that teach people go to heaven when they die are not teaching biblical information,
Nor the ones who say god loves 'all his children' or who present the biblical god as one of peace and love and mercy
God so loved us that he sent his only begotten son to die for our sins.
The Old Testament shows a vengeful God. A God willing to empower his people to wage war and destroy his enemies. That is true. However with the coming of Jesus that changed.
The fact that an opinion has been widely held is no evidence whatever that it is not utterly absurd. Indeed in view of the silliness of the majority of mankind, a widespread belief is more likely to be foolish than sensible.
Facts are stubborn things, but statistics are more pliable
-Laurence J. Peters