Americans' concerns over immigration were originally heightened by religious disputes between which two faiths?

It is the Protestantism and Catholicism. One of the primary significant contrasts amongst Catholicism and Protestantism is the issue of the adequacy and specialist of Scripture. Protestants trust that the Bible alone is the wellspring of God's unique disclosure to humankind and shows every one of us that is essential for our salvation from wrongdoing. Protestants see the Bible as the standard by which all Christian conduct must be measured.