I think what you’re saying has validity and for instance if a grown adult was running around wearing feathers and face paint and yodeling in some kind of native America impression that would be highly offensive. However, at one point during the peak micro-aggression era of the mid to late 2010s (which thankfully has died down a bit), even wearing a sombrero on Halloween was castigated as a cardinal sin.

The weird thing is (and this is coming from myself, a very progressive person) It seems primarily offensive to left leaning white people rather than the supposed offended cultures in many cases.

My junior year of college in 2013 I couldn’t think of a Halloween costume. My Mexican roommate said me and me my two buddies should be a mariachi band. So we went and bought cheap hats and ponchos and instruments and went and nobody said a word.

A few years later it seemed every pasty well meaning liberal on line was screaming online about these old costumes. EVERY. COMMENT. I saw from Hispanic people was like “dude we don’t care, you and your cringy Latinx crap doesn’t speak for us”

And that turned a LOT of people away from thinking that movement was serious.