President Thomas Jefferson was labelled  an unbeliever and a "howling Atheist" by the Federalists.
Explanation:
After his election into power in 1800, President Thomas Jefferson sought to put in place several policies, which he had been working on even before becoming the President of America. One of his most popular policies was the Bill of Rights,  a 10-count amendment that paved way for a federal government of limited power.  This was against the objectives of Federalists Papers, which sought centralize power in the hands of the federal government. They argued that the Bill of Rights should not be added to the original version of  the Constitution because it permitted the states, the people to have powers that should only belong to the Federal Government.
Some of the points presented in the Bill of Rights were the freedom to practice a desired religion, freedom of speech and the press. These positions did not go down well with the Federalists who sought that Union should withhold certain powers for the best interest of the nation.
Moreover, Jefferson was accused of having an unorthodox understanding of God which earned him the label of a “howling Atheist” and an unbeliever because among other things he strongly advocated for religious freedom and the separation of the church and the state.
