Not even a slight he endured.
The "slight" is the story of his father's torture by the Brits (during the Mau Mau rebellion, as I recall), which may or may not be true.
His father's dream was the destruction of Western Civilization, turning the whole world into a socialist/Marxist utopia. As described in the title of The Won's book "Dreams From My Father", he inherited that dream.
It was further stoked by the people he's associated with his entire life, from Frank Davis to "Reverend" Wright to Bill Ayers, nurturing from his earliest memories the hatred of Western Civilization, English-speaking people in general, and the United States in particular, an intense burning desire to destroy them all.
“Because some men aren’t looking for anything logical, like money. They can’t be bought, bullied, reasoned or negotiated with. Some men just want to watch the world burn. “ — Alfred Pennyworth