Three centuries of the slave trade had taught Europeans that Africans were inferior, and that helped to justify imperialism in the minds of many Europeans. Even slave abolitionists contributed to this by arguing that Africans had to be "protected" from slavers; i.e. they couldn't take care of themselves.
The people's sense of nationalistic pride
They were young Orthodox Christian boys from the balkans who were enslaved, converted to Islam, and then went to the Ottoman Army.
Answer:
Belief in many gods
On what you didn't explain what you needed help on
