Children do not always understand the actions of their parents, especially when very young, the child being closer to the parent in understanding and depth at any age differential than any human is ever to God. How then is it that you can know enough to judge God?
Given by your own standard, that things exist human beings simply cannot comprehend, how then is it that you know enough to know God exists? How do you know that other Gods greater than God don't exist?
Try this: Satan is a master of lies, deception, and trickery. Satan puts on a guise pretending to be God, and goes and speaks to a bunch of human beings like Moses. Satan gives Moses the commandments, a bunch of laws, and the message that
he is the only God. Satan condones genocides and the murder of women and children, and has it recorded in his book, The Bible. He creates a system of indoctrination where children must be baptized from birth and are raised under Satan's creed. He instills a false love so strong that it actually tricks your soul into believing Satan is really a loving and gracious God.
Then Satan goes over to another guy chilling in the desert named Muhammad. He teaches Muhammad a bunch of different laws, different ways to worship God, and different atrocities to commit. Along with this, he makes sure to tell Muhammad that
he is the only God.
This is all after Satan has been hanging out in Asia, spurring up Hinduism, Buddhism, Daoism, and other eastern religions.
In the end, Satan has deceived mankind into devising hundreds of religions that are all incompatible. This conflict results in millions of deaths over human history, and Satan still retains his hold on billions of humans. Brilliant.
Now, can you disprove any of that? Can you acknowledge that if supernatural things are possible that we cannot comprehend, that this instance may be possible and you just can't comprehend it?