Ust curious ..they say if you have a drop of blood of black in American society?

That crap originated during the race riots in the late 1960's to early 1970's. There was a certain black leader who told the black men to impregnate as many white women as possible because if the baby has "one drop of black blood in it then it is black." He also said we are going to turn the United States into a nation of black people. The statement was made in Selma, Alabama and I heard the speech.