Historians compare the treatment of European Jews to Japanese Americans because of two major factors. The first is that they were put in concentration camps. They had to work and many of them died. Another factor is there were many hate crimes against Japanese Americans and the government did not acknowledge it. This is why the two events are compared.
I believe that the answer is his body will become a part of the earth, because 'bequeath' means to pass something on or leave to someone else, and he is leaving his body and letting it become one with the earth.
