Praveen, that's an excellent suggestion. Thank you for your nuanced and sensitive response. Would anyone on the list who identifies as Hispanic like to help with that?
This discussion hinges on the issue of whether there is a difference between disrespectful cultural appropriation (e.g. Native-themed all-white frat parties) and respectful culture-inspired artistic and social explorations. Unlike Sonja, most of my lived experience has been in areas with much more Hispanic influence than the Bay Area. In New Mexico, I didn't hear anyone voice offense at whites celebrating DDM, because we were the minority and acknowledged as part of the community--our participation carried no threat because Hispanics were the often-dominant majority. Also, there were so many people of mixed ancestry, white-skinned Mexicans, and brown skinned non-Hispanic Native peoples that there was no issue of anyone being assumed to have "no understanding" of the holiday.
Also, I have seen the issue of race-as-culture be very much used to oppress people of color in historically white European countries where people of color can live in the country for 3+ generations and still not be viewed as, for example "really French."
Anyway, for now I'll revise the flyer. Just wait ten years until we get to transhumans vs. primate-body-identified humans. That will be an interesting discussion.