Appropriation or appreciation or even experience. I use a Hindu name, although I am no Hindu. I have practiced Eastern spirituality for a long-time now. When you get into past-lives then things get interesting. Who's to say that one's appreciation for a belief is not something based on familiarity or a spiritual event. Of course, it an be just a fad, like tribal tatoos. But, again, who is to say why someone wants such a marking. Respect and awareness is always key. And also knowing that any one group will have hardliners and those more liberal.