Welcome to the forum, Bob.
What puzzels me is that in rejecting the WT so many also reject their belief in God.
What is this "God" you think others are rejecting? The murderous-anthropomorphic-tribal-war-deity found within the pages of the bible? Is this what you mean?
For some it is clearly realized that any and all deities are too limited and moronic to have anything to do with the existence of Reality. So they simply stop believing in them. Besides, beliefs are only shallow mental images, anyway. You're not letting go of anything real.
What you are interpreting as a puzzling, may actually be the sign of awakening intelligence; for certainly if there is a true God it must be far, far grander than any little deity the mind creates.
Perhaps you are heading in this direction yourself, which is why you bring up the question. Watch out, you may awaken one day to find yourself an atheist; and in my opinion you will then be open to a far vaster sense of the Divine; one too, too vast for the mind to grasp.
j