i think almost all of the South is racist.
And yes the party was pretty racist until Kennedy and Johnson moved the party towards civil rights and those racist Democrats who didn't like it became Republicans.
I think there's plenty of racism to go around North & South. I wonder though if the writer covers the part your talking about or turns a blind eye towards those Democrats that fled the party & became Republicans. I checked G-man's link & the writer really seems to have an ax to grind.