What were the Protestants who left England in 1620 to start their own religion called?
they were called separatists if i remember right. anyways they left to be able to freely praise God not to start an age old religion.
Most of the New England colonists belonged to extreme Protestant groups, sometimes called Puritans because they wanted their religion to be "pure" and not tainted by contact with the Church of England or Roman Catholic faiths. The law in England at that time did not allow them to worship in the way they wanted to, so they decided to start a new life in a new country, with religious freedom.