Hm...well, I live in Texas and the whole Civil War thing isn't really that big of a deal to us.  To us, the Alamo, Texas' freedom from Mexico, Texas' joining the Union...those are the big historical things.  The Civil War is relegated to history like WWI, just more distant.  It was a major event, but one that passed, can be learned from, and we've moved on from.  
In Texas, we tend to be more annoyed at illegal immigration (being in the top 4 states to suffer from that problem, what with the wide border and all.)  That said, we also have a lot of people of Hispanic ancestry living in this state and have for ages (they say that Hispanics are the majority in South Texas, and probably will be for the state before too awful long.)  
We have a lot of Hispanics, a number of Blacks (less than Hispanics, though), and in most of our major cities (especially at colleges, such as were I am now) a lot of foreigners.  (An interesting observation; our engineering departments are dominated by Chinese students, our Physics/Math departments by Indian and others from the Indian sub-continent area [Afghanistan, Pakistan, ect.])  
While interracial marriage/children is looked down on by older people, most people under 40-50 don't really care.  I think we have a lot of Hispanic-European mixes than African-European, but we've had a long line of interracial marriage all the way back to where settlers would take Native American women to be their wives (I've got Cherokee ancestry, for example.  Something I sadly know far less about than I'd like to.)  
So yeah, maybe Texas is different, but we're really not like the OP suggests at all.  Maybe he only meant the deep South?  (Which, as I understand it, does not include Texas.)  
But no one speaks of succession.  Heck, Texas has the legal right (under the terms of its admission into the US; it was a separate country that joined the US rather than a territory becoming a state) to cede anytime it wishes, as well as split into up to 5 smaller states if it wishes (presumably for the additional 8 Senate seats that would grant the combined Texas states.)  
Don't get me wrong, we're independent, hard workers, and don't like relying on government programs and such (and, as such, are fiercely anti-Socialistic and anti-Left as a general rule), but in general, that also makes us very patriotic.  Texans love Texas and love the United States.  The idea of breaking from the US is not on anyone's mind.
...well, maybe the illegals that still want Texas back for Mexico, but...  
...of course, I can't say that I speak for all Texans either.  I grew up from age 2-11 in Laredo, Texas, on the border with Mexico, so I got used to living around people who were "different" than me at an early age.  To be honest, I don't really think of Hispanics as different from myself (and even can very well emulate the voice inflections of Spanish...wish I knew more words.  Being able to read it with perfect pronunciation doesn't do much if you can't understand it.  ^_^)  
Blacks are "different" than me, but as long as they aren't overly "street", I don't tend to notice and it doesn't bother me.  To be honest, I think it's the cultural and more dog-eat-dog thing that's associated with "street" that bothers me.  I debated philosophy with a guy today for over an hour.  I didn't even think about the fact that he was Black until just now.  ^_^  
Gee, does it make me a racist that I just realized that, or does it make me non-racist that I didn't realize it sooner...?