According to bartolomé de las casas, the factor that motivated the colonists treatment for the natives was that they were greedy for more goods, gold, silver, so on. Bartolomé de las Casas was a 16th-century Spanish colonist who acted as a historian and social reformer before turning into a Dominican friar.
The experiment was supposed to last two weeks but was ended abruptly just six days later, after a string of mental breakdowns, an outbreak of sadism and a hunger strike.