You claim that for God to let The Bible has mistakes condemns most people to Hell.
But that isn't necessarily so. What if God only cares about mistakes that actually might condemn people to Hell? Had The Bible been scientifically accurate about things that could only confuse in 200 AD, would that have made it more or less effective?
That said, it is true that most Christians believe that most of the world is going to Hell. Whether this squares with your impression of God is a well-known debate on the problem of evil. How you resolve that depends entirely on your impression of God. Since there seem to be as many of those as there are believers, and I don't subscribe to any of those, it is senseless for me to have a position on that.
I just wanted to point out that perfect accuracy in religious texts might not matter that much to a Deity. See the Baha'i faith for an example of a religion that claims that. More specifically they say that most religious texts are distorted in various ways to make them more effective at reaching people of that time and place and limited understanding.
Cheers,
Ben