Part 2: I do not believe that something can come from nothing. If one accepts an eternal omnipotent God, then it is rational to accept that God can make something from nothing and that would be an easy answer. But do we have to suppose that this universe was created from nothing? It is more rational, to my mind, to suppose that the universe was made from pre-existing matter or energy (or both) as the result of forces or actions that we have yet to discover. Each theory (big bang, expanding & contracting with a series of big bangs etc) should be more rational than the previous. We may never know, but we can make a pretty good suggestion without blaming God for it. If you explain the creation with God, then you have to go on and explain everything else with God, and that becomes very tricky indeed.
The point of the discussion is whatever you want it to be. For me, I find the subject fascinating and learn something about people and how they see the universe, and why so many people in the world have what I consider to be an irrational belief. Others may want to discover more about their faith, or whether they should have one, others (including me again) just like a good argument � it stimulates the mind. But mostly, I think, there is an innate desire to �know� stuff.