Neo-confederate types are quick to point out that Northerners and unionists weren't wholly behind 21st century ideas of racial equality. They make a point of that. I'd almost say they do a good job of it, but they don't. They get dishonest and deceptive about the Emancipation Proclamation and why the last stage of abolition had to wait until 1865. But at least they are trying to get underneath what they take to be the "official story" of history.
When it comes to the Confederacy itself, they lose all their critical powers and skeptical faculties. Everything is devoted to "proving" that the defense of slavery wasn't a major reason for secession and the formation of the Confederacy. They try to whitewash or sanitize Southern history by portraying the leaders of the 1861 revolt as more or less like 21st century Southerners, as people for whom owning and keeping slaves wasn't a central part of their lives.
Clearly not everybody was putting slavery first all the time. But if you could somehow be transported to Mississippi or South Carolina in 1860, you'd very quickly see how important slavery and race were to voters and their representatives. Follow the debates of the 1860s and you'll find that the defense of slavery was a crucial issue for the Old South, that outweighed all other questions of practical politics. The deception enters when people try to hide or deny that.
What you get from "Dixie Net" or the League of the South is a simplified whitewash that's more of a deception that whatever most people find in their history books. There are plenty of hucksters out their who prey on people's desire to hear the "real story" and simply provide a cheap comic book "North bad, South good" version of history.
People are deceived because they want to be deceived. The irony is that they think they're getting some deeper and truer understanding of history when all their really getting is a rehash of Old South propaganda and postwar excuses and evasions.
The neo confederates seem to forget that for the Southern landed gentry who dominated their states politically, their slaves had more market value than their land. Follow the money.