The authors mean that you can't discriminate against someone because of the color of their skin or the problems they may have.
Answer:
The five stages are: 1) Aninut, pre-burial mourning. 2-3) Shivah, a seven-day period following the burial; within the Shivah, the first three days are characterized by a more intense degree of mourning. 4) Shloshim, the 30-day mourning period. 5) The First Year (observed only by the children of the deceased).
A) Catholic immigrants caused the country's problems