@highwaystar101
Sorry, but the Big Bang Theory i not remotely proven, or even "a case that there is so much evidence that it must have happened."
I am an atheist, but I fall into the camp of "We don't know yet". I have no problem teaching The Big Bang as what we think it might have been, as today there is not another option that comes close, but in no way does that say I will state as fact that we know what happened 14 billion years ago.
We make predictions about space all the time, and more times that not, when we get a chance to prove our theories (probes), we are wrong. Nothing in the observed world tells me God did anything, so teaching religion in school like it holds the same amount of water is like teaching people about the spaghetti monster, so I am not defending his point.
I just can't defend yours either :)