The problem is that Christianity doesn't claim that God is in a box that we can't see inside of. It claims that God is everywhere, or, in other words, we all live 'inside the box.' The fact that we see no evidence for this god's existence inside this box is therefore good evidence for his...
I'm taking the scriptures literally, just as you do for everything that you agree with. Face to face with a god that doesn't seem fair, you apply your own interpretation. The list on #5 should settle any doubt on the nature of the Hebrew god.
I have compiled all of the reasons that caused me to become an ex-Christian. This list hits Christianity from every conceivable angle. It may not prove it false, but it does so beyond a reasonable doubt.
[MOD EDIT: link removed because linking is not allowed before 15 substantive posts]