A common descriptor of the Christian god (and many other monotheistic religions) is the word perfection. Despite some searching, I could not find any uniform description of what Christianity means by perfect. The most common I heard was that God is a “being without defect or blemish: a perfect specimen.” That is a good enough starting point, so we are working from that.
A being without defect or blemish? This is a hard concept for the human mind to understand, since we are definitely “defective” creatures. We have defects from the moment we are born; we have a vast collection of wants and desires. We want food, warm, love, attention, companionship. As we grow older, our list of wants and desires only grows. Family, wealth, purpose, community.
A perfect god has none of these. A perfect creature has no defects. There is nothing wrong with it, and thus no action can cause any improvement. Because there is no need for improvement, a perfect being does not have wants or desires. Any action would lead away from perfection, could only cause harm.
Without wants or desires, a perfect god can not decide to take action. In a state of perfection, all intentional actions are bad, since as stated above, they must lead away from perfection. A perfect god can not also be a creator god. Creations require a desire to create. A perfect god does not have desires.
The only creation a perfect god could take would be an unintentional one. A god could accidentally create a universe, since that is not a product of want or desire. But a perfect being is without blemish, and an accident is a blemish. Thus a perfect being does not have accidents.
So a perfect god is possible within our understanding of the universe. A perfect god has no wants or desires. It takes no actions, has no creations, nor is an accidental first cause. A perfect god does nothing, simply existing for all time.
If you want to believe in that kind of god, you will get no arguments from me. My only question would be: why would you want to?
-That is all.