My younger brother married a woman from a Cajun community in an unincorporated region of Louisiana called Des Allemands (the irony of a place with that name consisting almost entirely of Cajuns still amuses me). It's a very sparsely-populated area. Wikipedia says that, according to the 2000 Census, there are about 2,500 people who live in Des Allemands. It also says that 10.44% of the population (~261 people) identified themselves as African-American. That is not a lot of black people, folks!
It shouldn't be much of a surprise to hear that it's not known for being especially welcoming towards people of color. It's a real sundown town and my advice is that, if you are a person of color who plans to travel through that area, it would be wise to take that characterization seriously. It's a place where the word "nigger" is the default term used to refer to black people and I'm not exaggerating one bit here.
My sister-in-law has never lied or tried to hide the way her family felt about the idea of her marrying a person of color. They were dead-set against the marriage. However, from the minute when we first met her family, they were wonderful towards us. My dad and her dad sat and talked about fishing for hours while our mothers looked through family albums, cooing at all of my sister-in-law's pictures from back when she was a pageant baby. They still keep in touch with each other via telephone calls even though they live in different states now.
After Hurricane Katrina, my brother and his wife moved in with her parents. I remember my brother telling me about how proud her grandfather was to tell people that his granddaughter had found a good husband. He still used the word "nigger" from time to time, but he defended my brother any time someone tried to hassle or criticize him. They get along great now. He's helped them out lots of times when, as a very young couple, they sorely needed it.
Every year, they invite us out to the Crawfish Festival, which is the biggest event that the area hosts. Whenever we go, we never see more than a handful of obviously black people other than the ones in our family. The white people out there always ask us if we are enjoying ourselves and where we are from. They are all extremely friendly. My momma and daddy love to zydeco on the outdoor dance floor with all of the other white people in their age group. The older Cajuns that can only speak French have treated me like I'm family when I spoke back to them in my broken Louisiana French.
We have a damned good time, but always make sure we leave before sun-down. It's really easy to figure out what sort of things are likely to lead to troublesome situations with the folks out there. The unstated rules are fairly clear. I never feel like that when I'm around whites outside of the south. Most of them would never use the term "nigger", but they'd just as soon watch you die than to offer what most white people here would consider basic courtesy.
That Justice of the Peace who said he even allows black people to use his bathroom was being more progressive than I think most of these ignorant "OMG offended" white outsiders ever bother to become. It's been a minute since I read it, but in "Black Like Me" I seem to recall John Griffin writing in depth about how whether whites allowed him to use even the nastiest, ricketiest, outhouses on their property revealed a lot about what sort of people they were. People who were perfectly friendly and had no problem selling (the black) him their wares, would become stone-faced if he asked to use their bathroom, even though they had no problem allowing him to use it when he looked like a white man.
The context wasn't worth understanding for most of the white people who were so indignant about the actions of the Justice of the Peace. The writer of the article I linked to didn't even bother to find out that none of this occurred anywhere near New Orleans. Hammond isn't even in the same parish as New Orleans. Hell, it's not even in a neighboring parish!
This was just another opportunity for white society to reinforce its own hierarchy of whiteness. I think it's the same with the experiences of mixed people of color who are part white. What we go through doesn't mean shit to the average well-meaning white liberal unless it can be used to prove some point about the issues that concern them.
Our experiences are constantly de-centered and I think it's because de-centering is one of the hallmarks of white society. Any entity that chomps its way through other societies will inevitably chomp through parts of itself. I think that the outcome of the elections regarding gay marriage in California and Maine is an excellent example of how this works.