I find a good guide is to rewrite insults to aim at you, and your expected readers. If you don't want to do that, you probably shouldn't have put them in.
For what it's worth, I found the quip to be funny. I also found it to be appropriate in the context, as anyone who has braved the Black Friday crowd would (only once - lesson learned). But then again, I'm also one of those old curmudgeons who think that everybody gets their panties in a twist way to easily these days.
Translation: I've spent my life freely and casually belittling people I see as beneath me, and am annoyed that these uppity women and minorities are feeling empowered enough to call me out on it. They should all mind their place.
Being a privileged white male isn't what it used to be.
Why would you think anyone else is beneath you? I'm sorry that you feel privileged in some way because you are white, but everyone is created equal, regardless of race. You'll be a happier person if you live and let live, instead of letting people annoy you so easily.
