This YouTuber makes a point of parallels to the Confederacy, with two elements of note:
1. He says it should be "concerning."
2. He makes a case that Josh Whedon, the creator of the series, was planning to take a shot at Southern "revisionist" history with it, had it continued.
My comments:
1. Sounds like the show ended just in time, before Whedon could turn it into a PC vehicle.
2. Regarding the Confederate parallels, you're forgetting that in 2002 people weren't so "woke" and anti-White as today. It would not have been seen as it is today. You're close to guilty of cultural relativism.
A shame for that YouTuber to curse such a great pre-Woke show like that.