‘the founders of this country were proud Christians, and since their concept of “God” is the trinity’
Many of the Founding Fathers were NOT trinitarian Christians. Adams, Franklin, Jefferson, Rush, and Paine in particular espoused what for Christians would be considered heretical views. And George Washington appears rarely if ever to have taken communion. Not until 1888 would the United States elect a person as President who was a communicant member of a (small-o) orthodox Christian church at the time of his election.