They believed so because the military strength of those countries increased in size by almost twice in the period between the two wars. They also felt humiliated after how World War 1 was resolved so they wanted their revenge and believed that they deserved more. Other parts included Africa and parts of Asia.
Since Muslims felt that enslaving non Muslim Mandinka was lawful, Mandinka could have well reasoned enslaving Ayuba, a Muslim, would have been just reciprocal and fair (what goes around, comes around).
The British government would not address American complaints that the new laws were unfair. This then led for the Americans to revolt and make the Declaration of Independence from the British.
Answer: It protected all classes equally in Rome
Explanation: