Yet according to the Old Testament god communicated with people directly and through angels and even a being in human form who performed miracles. There were interactions in the physical realm. Should that kind of evidence present itself then that evidence would suffice for most non believers IMO
The Apostles had evidence. For one-twelfth of the Apostles evidence made no difference. Those in the Old Testament who reported seeing an angel (or even a burning bush) only had their word, no evidence. (Sure, Moses, you saw a burning bush that showed no signs of burning. And your proof is a bush that has no signs of burning.)
Once we choose to explore beyond the physical, we must let go of the physical, which means we are in a realm with no evidence. Other than our word, and as we all know, that can prove tricky as well.
What I find interesting contemplation, is that even with evidence a bit over eight percent of the population would still not believe. What do you think...was Judas' problem not enough evidence?