A question for the christians among us Suppose there was no jesus; no new testament Only judaism and their torah, etc Would you believe in god? Would you become a jew? Would you conclude that old testament is proof of gods existence ? Without meaning to criticise the jewish religion, i do not see that it is particularly compelling for people not born as jews. And, for that matter, the jews do not seem anxious to evangelize their religion to non jews. So, if there were no jesus, no Mohamed, what would all the non jews be believing in? Of course there were many thousands of years where non jews around the world got along fine withoud judeo christian or muslim religions.
There would be no point since the OT was only written for the Jews of that time. You also have another problem in that God tells us of the coming messiah in the OT who replace the laws the Jews had to follow.