Is this a rhetorical question or the catalyst to some line of questioning where one gets to reaffirm their disbelief in God? You already know there are people who will find irony in it because they do not believe in the God of ”In God we trust”. Those who have issue with the phrase can just say in their mind the god being spoken of is Zeus, Baal, Moloch, Ra, Osiris, or any other garden variety gods.