A good read on Smithsonian online:
America’s True History of Religious Tolerance – The idea that the United States has always been a bastion of religious freedom is reassuring—and utterly at odds with the historical record. — By Kenneth C. Davis
In the storybook version most of us learned in school, the Pilgrims came to America aboard the Mayflower in search of religious freedom in 1620. The Puritans soon followed, for the same reason. Ever since these religious dissidents arrived at their shining “city upon a hill,” as their governor John Winthrop called it, millions from around the world have done the same, coming to an America where they found a welcome melting pot in which everyone was free to practice his or her own faith.
The problem is that this tidy narrative is an American myth. The real story of religion in America’s past is an often awkward, frequently embarrassing and occasionally bloody tale that most civics books and high-school texts either paper over or shunt to the side. And much of the recent conversation about America’s ideal of religious freedom has paid lip service to this comforting tableau.
From the earliest arrival of Europeans on America’s shores, religion has often been a cudgel, used to discriminate, suppress and even kill the foreign, the “heretic” and the “unbeliever”—including the “heathen” natives already here. Moreover, while it is true that the vast majority of early-generation Americans were Christian, the pitched battles between various Protestant sects and, more explosively, between Protestants and Catholics, present an unavoidable contradiction to the widely held notion that America is a “Christian nation.”