https://www.smithsonianmag.com/history/founding-fathers-and-slaveholders-72262393/
Jefferson, like all slaveholders and many other white members of American society, regarded Negroes as inferior, childlike, untrustworthy and, of course, as property. Jefferson, the genius of politics, could see no way for African-Americans to live in society as free people. He embraced the worst forms of racism to justify slavery.
In Notes on the State of Virginia, Jefferson describes the institution of slavery as forcing tyranny and depravity on master and slave alike. To be a slaveholder meant one had to believe that the worst white man was better than the best black man. If you did not believe these things, you could not justify yourself to yourself. So Jefferson could condemn slavery in words, but not in deeds.
At his magnificent estate, Monticello, Jefferson had slaves who were superb artisans, shoemakers, masons, carpenters, cooks. But like every bigot, he never said, after seeing a skilled African craftsman at work or enjoying the fruits of his labor, “Maybe I’m wrong.” He ignored the words of his fellow revolutionary John Adams, who said that the Revolution would never be complete until the slaves were free.
Jefferson left another racial and moral problem for his successors, the treatment of Native Americans. He had no positive idea what to do with or about the Indians. He handed that problem over to his grandchildren, and theirs.