1st question: Travel accommodations for most immigrants to the United States were dirty crowded and unhealthy many died on the trip there from a disease. 2nd question: Probably, African Americans because what attracted people to the United States is that they could pursue and practice religion freely. The idea that Jews were different came later. 3rd question: What attracted most to the United States is religious persecution. 4th question: The first people to arrive to the United States were Europeans for religious persecution. So, the answer is European Protestants.