Absolutely, my phrasing here actually reductive to the point where it doesn't tell us whether he had moral standing to do so - (and that's by design; I actually don't know enough from this article, or others to know whether I agree with his behaviour or not, so I haven't weighed in on that). I'd agree that "standing up for their principles" describes segregationists too- i don't think it tells us who has the right side of an issue.
Whether Dail is right or wrong here is actually irrelevant to my critique above: my intended point was supposed to be:
that the comparison between this person (whose activism at their workplace cost them their job), versus Obama's critique (of people issuing issuing barely-thought-through rebukes online that they aren't invested in), is a pretty unhelpful comparison.
People asserting changes to what is or isn't acceptable in their workplace are absolutely risking blowback for it, and I maintain that's not remotely the same thing as the online brigading / mob justice / cancel-culture conducted by people who can often be trigger-happy as they stand to face no adverse consequences if their critiques are rejected.
I apologise if my phrasing above made this less than clear. It looks to have been interpreted as clearly siding with Dail's position on matters.
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EDIT: Your choice of example is also interesting though: "Hey look everyone, Pryce refused wave the same flag as I do, get the pitchforks!" is a clever choice on a BLM-related issue; as regardless of what happens in Dails case, it actually quite well characterizes the President's position (and his support bases position) on kneeling in the NFL -and now other sports-, to the point where he has called for the firing of people who refuse to stand for the anthem (and/or) flag.