“JACKSON, MISSISSIPPI — Overcoming disunity, out-of-fashionableness, poverty, and aching feet, the civil rights movement was reborn Sunday on the grounds of the Mississippi state capitol, before the executioners’ eyes of 700 Mississippi troopers and police, armed with M-1s, live ammunition, and tear gas. The ragged band that had begun as one mystical prophet in Memphis, that became 100 in Hernando, that became 1000 after the baptism of spit in Philadelphia and tear gas in Canton, had become 15,000 Sunday afternoon. And they were 15,000 Mississippi Negroes, their biographies etched in their bent spines and gnarled hands. There were a few clergymen, 100 New Left types, a small group of 1930s liberals like Paul O’Dwyer, and a handful of dreamy Dylanesque kids, but mostly they were the porters, maids, and high school students of Jackson, giving a great movement the rare gift of a second chance to redeem its country’s greatest…