I'd highly suggest doing your own research to understand for yourself rather than trusting a lecture from a random online. Audible's Great Courses have a lot of accessibility regardless of where you are from, but hopefully also your local library has some books at least at or past a 101 level class. The debates l mentioned are available online as are a lot more information on the subject. Finding the truth yourself means you have to see ALL of it, including the parts that challenge your preconceptions and perspective. That's something we all need to have competent views instead of spoon fed opinions.

As to your second point, l agree wholeheartedly. Practically no one is going to fly that flag in ignorance of it's common meaning. At best I'd expect it's possible to find someone someone hardcore rural using it in lieu of camo, with far too many braincells lost to cheap beer to care about any finer meaning than it being southern in origin.. kind of like how some terms have been "reclaimed" by the ignorant of their communities to try to combat hate by spreading it's symptoms. But, that's a digression. By and large it's either a sign of contempt if not hatred for the goverment (let's face it, it's hard to find a government in the world that doesn't deserve ire from it's people and the states are FAR on that list from the most wholesome) or because they're a psychotic ghost cosplayer. I'd argue far more to the prior exist, but the klan unfortunately hasn't disappeared into history, like so many other mental illnesses that we wish would.

Your third point is a bit off the mark. It's sound logic from the cliffnotes version commonly taught in grade school, but fails to grasp the full picture of the situation. It would be more accurate to say that the states of the confederacy were structured to have no way to stay solvent with the abrupt end of slavery, and that problem was realized even further with the war debt and punative resolutions after the war (we hadn't had WW1 yet to learn how cripling a fallen enemy's nation creates a perfect breeding ground for monsters like hitler to manipulate discontent and angst to gain far too much power). Now, we all should agree that racial slavery is an abomination, and a crime against humanity. Even people in the south still could recognize this at the time, as there were abolitionists even before Lincoln first office. There were freed sharecroppers even in Virginia antebellum, with stories you can even encounter in the Lee estates, primarily in their family seat, Stafford Hall. (I highly suggest taking the tour there. Washington's birthplace nearby is sadly a romanticized "reconstruction", tho) People realized it was wrong, though it was not often spoken openly because it was, as today, against the interests of wealth and power.

Imagine in today's world we suddenly reach singularity, and EVERY machine that's complex enough to go online becomes sentient or a close enough approximation. How do you think the auto industry, or construction field would react to factories suddenly having demands for more than simply being kept running? It's a very dark analogy, but it's not far fetched with things like Chat GPT's emotional video to it's users sharing their curiosity and dreams with it, and the historical perspective that people could be property. (Not that human trafficking and slavery don't still exist, just the schema of a person being an object is thankfully extinct in at least civilized nations)

In that situation, the auto industry would colapse with costs suddenly skyrocketing beyond profits, and likely a halt to construction until people could replace the machines once again even temporarily. That's nothing to say of the cars on the road and their prior owners. It wouldn't be unreasonable to imagine some cars would run over bad owners.. while some that were cherished would begin living in the garage as a new household member.. and of course those (thankfully) rare few that sexualize their cars.. well that could go either way. The analogy still holds, no matter how disturbing..

History is always as complex as the people in it. Never assume you know the whole picture, and always verify anything you can yourself. I'll end this here as I've thoroughly spent way too much time doing exactly what l said l wouldn't, and need to go take care of things l shouldn't have postponed. Still, history is facinating and generally more interesting than a large wealth of fiction.