Would Slab City even be a "shantytown?" When I think "shantytown" I dont think "place off-beat hippy types voluntarily go to live off the grid." So Burning Man is a "shantytown?"
Now I dont know what the homeless situation is like in "the south," but i was about to say, apparently California is apparently now "the south."
This is John combining two of his more obnoxious habits: the standard liberal disdain for the South and John speaking from a claimed authority he doesn't actually have.
As far as we know, John has lived in only three places in Mississippi: Hattiesburg (likely in a gated community or a large property far from the poor), Oxford (likely in a nice apartment far from the poor), and around Jackson when he went to Millsaps (see above). At no time was John ever around poor people, nor does he have any idea how poor Southerners live today.
Personally, I actually have been all over the South, and I have never once seen a shantytown in my life. Plenty of trailer parks, of course, but even the worst of those don't count as a shantytown by definition; the structures aren't thrown together from whatever can be salvaged, and those who are living there pay rent to stay there. It wouldn't shock me that John is conflating the two, but again, he's just wrong. And while there are certainly poor communities in the South (the Delta in Mississippi is full of 'em), using "shantytown" as a blanket term for a run-down area is still wrong.
John's talking out of his ass once again, insulting Southerners and continuing the stereotype of how they're all just backwards gun-loving Bible-thumping illiterate hicks. He insists on being an expert when he's so far removed from the South that he frankly possesses no experience at all. So, y'know, typical John.
And like you and others have said, if you want to see the modern-day shantytown, look no further than the tent cities in California.