Why did sectional hostilities abate as quickly as they did after the Civil War?

The previous post by pohnpei was pretty accurate
concerning the North's attitude of just ignoring the South after the conclusion of the
Civil War hostilities. Southern hatred of the North certainly DID NOT abate quickly;
more accurately, it gradually diminished following the deaths of generations of
Southerners, leaving only a New South populated by men and women who, like Northerners
after the war, just didn't care anymore.

The South was
beaten long before Lee's surrender at Appomattox: Its towns and crops were destroyed,
its slaves were freed, its men were dead and maimed. They were not likely to rise again,
but Southerners would not forget quickly. In response to the influx of carpetbaggers and
scalawags, dishonest Republican politics, and former slaves with rights now equal to
their former masters, the South fought back with the rise of the KKK, Democratic
politics and, eventually, Jim Crow laws. Civil War veterans groups, though found in the
North, flourished in the South, their influence only fading as the last veterans died
away. Today, Civil War reenactments are annually held on most of the famed battlefields
of the South, as well as on many of the minor sites of obscure battles--another
sign that remembrances of the war are not yet dead in the
South.