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The self-radicalized madman who attacked four rookie Queens cops with a hatchet had more than just ­jihad on his mind — he also wanted to kill white people.

“He wanted white people to pay for all that slavery and all that racism,” the father of slain hatchet loon Zale Thompson, 32, told The Post Saturday. “I think he committed suicide — and he was taking one of y’all with him,” his father, Ralph Thompson, said, speaking through the screen door of the two-story Queens Village house where his unhinged son also once lived.

Asked if “one of y’all” meant white people,” the father said, “Yeah.”

“He just said, ‘They have to pay for all their unfairness,’?” the father added. “Unfairness for the way they treat black people.”