You believe in a '...God that is disinterested in the material realm..'?
Well then, your God is not physical but spirit as far as His ontology is concerned, I imagine?
And, yet, you don't attribute His efforts in creating the universe (physical entity), which your previous posts on this thread appear to assert?
What or where then, is God's involvement, impact, or influence, in anything within the universe, or outside?
He must have left His mark somewhere, or has a purpose in something, for you to draw the conclusion that He exists?