Your nation was mainly founded and settled by evangelical Christians. As a "rebel", perhaps you should also be reminded that Jefferson Davis, Robert E. Lee, Stonewall Jackson, etc., were devout Christians. If you find this offensive, perhaps France, Germany, Sweden, or some other more nation more de-Christianized and socialist than America would be preferable for you.
As for Lee, he had too much personal honor and integrity for me to ever consider him a complete Fundamentalist : )
I understand part of your point, but, respectfully, the founders were 55% Episcopalian/Anglican. There were actually more Catholics than Calvinist founding fathers.