Can you not foresee the dreadful consequences if societies followed this short sighted view of reality based upon very limited human scientific knowledge?
If we try to use our limited knowledge of science to reject the Christian faith, we also are in danger of rejecting the profound wisdom espoused in the New Testament which has formed the foundation of our Western society. There will be no concept of sin or evil. Nothing is right or wrong. We can do anything we want, because we have no real choices anyway. Can you not see the dreadful consequences? Not only will we lose sight of eternal salvation, we will create a living hell on earth.
That is confused, baseless, self-contradictory and irrational. So much wrongness in such a small space, where to start ?
OK, point 1. I think it is always going to be a better policy to use the best information, the best knowledge, that we have. Just because we never have complete knowledge should not be a reason for ignoring the best information we have to date.
Point 2. It's not essentially about rejecting some or other faith position so much as being true to the evidence. If a faith claim contradicts evidence and reason then it should be challenged.
Point 3. as for concepts of Sin and Evil, good riddance to them, there is no justification, no evidence for them, and they have done harm and continue to do harm. If we can remove those simplistic blinkers then we can start to see the real reasons underlying dysfunctional behaviours; with understanding comes the possibility of healing and improvement in the future.
Point 4. Salvation is another fantasy belief, given there is no evidential grounds for it. It is also self contradictory in so far as it might imply a god who claims to be loving but in fact who discriminates against people who try to use the intelligence and integrity that he gave them.
Point 5. I think the fear of a 'living hell' might be somewhat misplaced. I recall Freud believed the loss of religion would lead to the breakdown of society, but what evidence we have to date suggests the opposite is the case. Loss of religion leads to humans becoming more humane, the data points to a inverse correlation between levels of religious observance and indicators of societal well being. A society which simply writes off it's wrongdoers as 'evil' is less humane than one that seeks to understand the real reasons leading to harm.