From Wikipedia:
at least 4,743 people lynched in the United States between 1882 and 1968, 3,446 of them black, 154 of them women,[3] 73 percent of them in the South.[4]
A tragedy, sure, but this number is small compared to amount of black-on-white violence we live with today. Everyone agrees that lynching was bad. Today, the black-on-white violence is often passed off as a by-product of White Racism and Oppression of Blacks -- in other words: whites deserve it.
Not to mention many of those lynched had actually committed crimes.