The curse of Ham
Judaism has always advocated equality as all people were created in "the image of G-d."
In Genesis 9:20-27, we are told that Noah plants a vineyard and became drunk. After some certain events unfold, Noah cursed his grandson Canaan. But Canaan wasn't alive during the flood.
Noah curses his grandson Canaan to be a slave. This is the lowest level. Why does Noah make this curse? In any event, the tale seems to justify the conquest of Canaan. Slaves own nothing. So, the Israelites could take what they please and do with them as they want.1 Thus, the servility of the curse that Noah pronounces to Ham (through Canaan) is that all of his descendants will become slaves. But aren’t curses merely words? Do curses work? Words do not have mystical powers. Nevertheless, racists have used Genesis 9:25–26 to support their claim to white supremacy. Tradition says that Cush, the son of Ham (Genesis 10:6), is the father of the African race. They use this as proof to sanctify the institution of slavery.
Actually, the curse of Ham does not and cannot refer to the Africans nor the Canaanites as can be seen in this answer. It is a later Christian invention to justify the institution of the slave trade. Abarbanel merely followed that wrong teaching, being a product of his time. Additionally, many rabbis took part in the black civil rights movement. And when Rabbi Nathan Drazin was told to abandon his synagogue congregation of 5,000 people in Baltimore, Maryland due to black migration, he chose to stay and teach a small black community the love of Torah. As with the slave trade, it was also a Christian, William Wilberforce, who brought about the abolition of the slave trade in a debate in parliament in London, 1833.
1 This is the idea from great biblical scholar and rabbi, Arnold Ehrlich
 Although Wilberforce tried to convert as many Jews as he could to Christianity