I declared myself ignorant to be able to know.
What I do find, is that pretending to know, who God is, what God is, and what he/she (Always a he?) wants, is nothing but pure human (ignorant) vanity.
The concept of "God" probably is one big projection of ourselves. As we probably have this enormous potential project ourselves in this experience we call 'life'.
Next thing to wonder, may well be: "Why do we need the projection of a supreme being?"
And: "Why don't we feel just ease when believing in such a deity/supreme being? E.g.: Why do we Always want to convince others of us being righteous in the whole matter, while it all comes down to "a believe"?
And most of all: "Why would any God be in such a bad need to be worshipped all the time?" Feels so strange to me...
So, best argument: How can you ever know to be right? And: Why should it matter, in regard to our experience in here?