Hello! Judaism is the oldest religion on that list and your answer. Christianity was formed on or around 33 AD, with protestant denominations being formed from the protestant reformation in the 16th century. Islam was formed in the 7th century. Jewish history begins around 1800 BC.
They were treated like they didnt mean anything to anyone because they were slaves. If you were a slave you were treated like an animal. There was a woman named Harriet Tubman and she risked her life over and over again trying to help slaves escape.