Luckily, the North South cultural divide seems to be dissolving. The VAST majority of my family (all from TX and LA) could really give a hoot about it, even with several ancestors serving in the Confederate Army. About the only true divide I can see is the perspective of the exact controversy that started the war (which is best not debated here).
Several family members like to tease me for marrying a Yankee, and now marrying another Yankee. Sweet Pattootie just "defends" himself that he did live in New Orleans for a while.
Besides, technically, XH is a Midwesterner, and Sweet Pattootie is a Chicagoan (which he teases is a more elite subset of the Midwest).
And while I lived in Chicago, I certainly got teased about being a Texan - sometimes it was rude, usually it was just an awkward tease. I can't begin to count how many times I've heard "Texas?! Only steers & (rhymes with steers, starts with a Q) come from Texas!" from Full Metal Jacket. But I can genuinely say that at worst it was only rude and never truly hateful.