I asked this in another story ID thread here; I might have even made my own thread about it. No luck getting it IDed then, but maybe I’ll have more luck here. It’s a short story I read as a kid. It has the feel of an Asimov story, but I’ve looked at descriptions of all his short stories and haven’t found anything that sounds like it:
Some time in the future wormholes have been invented/discovered that allow people to travel great distances quickly. The main character uses his personal wormhole to commute to work-- he lives say, in Los Angeles and takes a short walk through the tunnel-like wormhole to his job in New York (I don’t remember the actual commute location and distance).
He discovers a tear in the wall of his tunnel-like wormhole and curious, walks through the tear. It takes him to a desert where small (like inch-tall) people wearing primitive clothes are wandering. He continues to visit them day after day and they start to worship him. He like the hero worship and encourages it. Then he gets ahold of some texts they’ve created and gets the language translated by his work computer. It turns out to be ancient Hebrew, and the people in the desert turn out to be the Israelites led by Moses through the desert. So the tear in the tunnel took him back in time, and the man is mistaken for God by the Israelites. The reason the Israelites were so small is because of the expansion of the universe in that time period (I know that’s not how it really works).