librarygeek

That tribe is outside my range.

However, as a general rule, people like to be asked. Since you're interfaith clergy who will be speaking at a memorial service, it's reasonable to contact the tribe and ask about their do-and-don't list. The worst that can happen is they'll bite your head off, which would suck -- but the best is that not only would you get good input, they would then know about you as a tribal-friendly interfaith person in case anyone over there needs such a thing.

Yes, racial relations are a mess in this country. It's never going to get better if people don't reach across and try to fix it. You can't change the past. You can change the present.

For what it's worth, I tend to start interfaith event design by looking for common ground. Lots of traditions use candles or incense, for example. If you can get someone talking with you, it might be possible to find overlaps like that.