converting back unto theism - yes it's true.

[Watson]

Consider this, then: The OT was written by mere men, who only understood God insofar as they understood the world around them. So, whie certain aspects of the OT seem very loving because they are written by men who were a bit wiser, other parts are written by men who did not understand how scientific laws and principles worked, so certain occurences, say for example lightning, were simply attributed to God, thus making Him seem bloodthirsty.