Hi Open Mind
That is a lot of questions and I won't try to answer them all at this stage.
I don't think it is true to say that scientific training and atheism necessarily go hand in hand in quite the way you suggest. There are theistic scientists and atheists with little scientific knowledge. However I agree that there does seem to be a broad correlation between the two.
Rather than your implication that the scientifically trained think they have all the answers I think the opposite is true. Scientific training both breeds and attracts those with the following qualities that are relevant to this debate:
1) A desire to get beyond the superficial and ideological "knowledge" in order to find the "truth"
2) An evidenced based approach to investigation.
3) A healthy scepticism with respect to knowledge.
4) An ability to acknowledge that the answer "we don't know" is better than an unwarrented claim of certainty.
5) An ability to acknowledge that evidence is always imperfect and that interpretations are always subjective (thus leading to the methods of science as the best methods of achieving objectivity and reliability of knowledge)
6) An appreciation that absolute certainty is not possible. Science, and indeed any evidence based method of investigation, is necessarily tentative to some degree.
In short science is about recognsing the limits of our ability to "know" and imposing the methods and criteria required to maximise the reliability of of our conclusions with this in mind.
As a self avowed atheist and physics graduate I guess I am your target audience
The bottom line as far as I am concerned is that the evidence for theistic claims is just utterly absent and the methods of investigation with regard to these claims just does not justify the outrageaousness of these conclusions.
I don't think faith is noble. In fact quite the opposite.......