In one culture that may mean a single omnipotent consciousness that is aware of human thoughts and behavior and that responds to our wishes and prayers. In another culture, the concept of "God" may refer to something entirely different, such as a multitude of different Gods such as those of the Ancient Greeks. The only way for two individuals with different specific beliefs that are inconsistent with one another to determine who was right would be through scientific testing. The Affirmative Burden of Logical Proof

Many types of beliefs (including beliefs in Gods) may be incapable of ever being tested empirically. Nevertheless, another more general aspect of scientific reasoning is highly useful in that regard. Namely, the beginning point for any 'scientific" discussion of ideas must be that nothing is true ab initio ("from the start") or a priori ("from the former"). In scientific reasoning, one must always begin any process of analysis with the proverbial...

Moreover, anything that is fundamentally inconsistent with a specific belief (such as of a "loving") God, necessarily disproves that belief.
Therefore, to a scientific thinker, even the belief in God must be based on some empirically valid reason to believe that the existence of a god is more likely to be true than not. Finally, any supposed characteristic of any god cannot be true if that characteristic is inconsistent with observation. That is precisely why may scientists have a very hard time believing (especially) in any god who is both omnipotent and loving but still allows bad things to happen.

Reference

Feynman, M. (2005). Perfectly Reasonable Deviations: The Letters of Richard

Feynman. New York: Basic Books.