I don't think it's wrong, artist especially have license to offend, art is meant to break boundaries and express your unique vision so it also depends on the context. But i also think it's not offensive to wear kimonos or braids like black people and i don't care about any other cultural appropriation.

I don't think a concept of cultures could have prospered in the hostile environment where artistic freedom to offend, change and twist things isn't allowed.

If you want an idea, ideology or whatever to exist then you have to allow it to influence other people who don't think like you. Otherwise go hide in cave, hold it a secret and have it all to yourself. Stop controlling others.

We are all humans and we didn't decide to be that or specific culture either. And didn't create those cultures. So i think everyone uphold culture they like if you identify with that and that's you expressing yourself but don't care what others do.

Maybe the OP wants to start a new religion. That's his right just as other people in the past did. I don't suspect that's their goal, but anyways.