Junior says that the original purpose of the reservation was similar to concentration camps. How so?

The similarities are more obvious than the differences. The Native American reservations were based on race, the tenants were rounded up and forced into distinct areas, and the government was the culprit. However, the differences were distinct, starting with the motive; the early American government, in their expansion mode, wanted to encourage western migration, and Native Americans resisted what they saw as an intrusion on their hunting grounds and lifestyle. In Hitler’s Germany, it is true that the Jews lost all their property as well, but the primary mover was the annihilation of the race (Native Americans were never in danger of that, although their lifestyle was disappearing). Another difference is that reservations were not actually fenced in and guarded by soldiers, but there was abuse of individuals.  Finally, Native Americans could and did fight back, even dropping past disputes to join with other tribes.