Obvious vs. unobvious acts of God: Are Miracles Confined to "Salvation History"?

Certain opponents of intelligent design in the area of biology insist that God works in obvious ways (as opposed to working through what appear to be merely natural events) only during periods of "salvation history" involving particular religious contexts.  Here I explain how such a dogmatic view would create a problem with getting a religious context off the ground. How could anyone be justified in the first place in believing that God was performing a miracle, if the immediate past events appeared to be ordinary? If Moses accepted this view, how could he be justified in believing that the burning bush was real? After all, just before he saw the burning bush, everything seemed to be going along naturally, and he had little or no independent reason to believe that he, personally, was going to be a central figure in "salvation history."   The article by Meredith that I mention in the video is here:  https://www.firstthings.com/article/2014/02/looking-for-god-in-all-the-wrong-places