Brock, Parker, and Crossan are all semi-Pelagians or worse. Brock comes from the Campbellite tradition (which denies original sin altogether); Parker comes from the Wesleyan-Arminian tradition (which claims that the depravity inherent in original sin is neutralized by universal prevenient grace); and Crossan comes from the Romanist position which assumes that, whatever original sin is, it is easily washed away by holy water.
So, my friend, are you saying that someone from the Wesleyan-Armenian tradition is NOT a Christian? and where did you get that quote "neutralized by universal prevenient grace?" Inquiring minds need to know.