The dividing line has already been drawn - we're just rehashing it hoping to come up with a different result. Machen, in his book title Christianity and Liberalism, showed that non-supernatural / modernist Christianity (which he termed liberalism) and supernatural / fundamentalist Christianity (which he simply called Christianity) are in fact two separate religions sharing a common source and some overlapping language. Of it, he said:
Trying to be "nice" about it has let the bomb get bigger before it blows up in everyone's face. It would have been better to take a different route (especially in our denomination) 80+ years ago.
There is much interlocking of the branches, but the two tendencies, Modernism and supernaturalism, or (otherwise designated) non-doctrinal religion and historic Christianity, spring from different roots. In particular, I tried to show that Christianity is not a "life," as distinguished from a doctrine, and not a life that has doctrine as its changing symbolic expression, but that--exactly the other way around--it is a life founded on a doctrine.
If you'd like to read on the historic and philosophical arguments that support the Bible's claims of the miraculous, visit (and support) Greg Koukl's ministry at Stand to Reason. I also highly recommend the work of Gary Habermas on miracles generally and especially on the resurrection of Jesus.