Are we supposed to ignore requests made for viewpoints in your future threads?
You seem to miss the point.
The universe is visible, isn't it? This thread is on how we can discover God by observing nature, not about how nature could possibly be. If you want me to reply what would happen if reality were different is a senseless question, because we have no possible norm to test the accuracy of our answers. The answers to the main question of this thread, on the other hand, are perfectly justified because they are about the reality as it is, no possibilities involved. Whether you call this visible revelation Jehova, Allah or Jahwe is another question beyond the subject of this thread.