Montesquieu is describing the "Separation Of Powers" which is important because it states that government should be split up into 3 branches the Legislative(which is Congress),The Executive(the President), and the Judicial(the Supreme Court). Montesquieu wanted this so that power could be divided equally and so that it wasn't just one big Government with all the power.
Answer: The white men were threatened by his status as a freedman.
Explanation: “So him and two other struck me with a stick and told me they were going to kill me and every other Negro who told them that they did not belong to anyone”