No. The OP inferred that "southern culture" was racist and he said that in spite of its Jim Crowe laws, its segregationist history, its denying its black citizens the right to vote and its occasional lynchings of black men and women for failing to act their part, they weren't.Yes. You did when you implied southern culture is "racist". Would you attribute all of the negative stereotypes of blacks and other minorities part of their cultures?
Is "racism" limited to "the South"? Certainly not. However, the conditions of blacks in The South certainly provided the fodder for attempts to end racism as it exists in America.
His talk of a "war on The South" sounds vaguely familiar to the charge of the right towards liberals and their claims of a "war on women"....Both points are a wee bit extreme. Not that both sides don't have their validity.