Ariel,
No one said you had to leave. But before you lecture someone on what to call themselves, and about their spiritual beliefs, maybe you need to stop and consider who you are posting to. The majority of us on this board are First Nations people. Most of us call ourselves Indian, or by the tribe we come from. I do not practice "Native American Spirituality". I live the ways of my ancestors. I live in the culture of my ancestors. It is not a religion, it is a lifeway. It is not something some one can teach you to be in a series of classes for a few weeks. It is not something that seks converts. There are non-Natuve people in the community. They are usually married to someone who is a tribal member.
Stick around. Maybe we will each learn something. For me, I would like to learn how to make my pagan friends understand how harmful it is to take bits and pieces of my culture and drop it into the middle of a pagan ceremony. There religion tells them "If it feels good do it unless it harms someone." Well, it DOES harm someone. But they do not wish to hear that. It interferes with their wanting to do whatever strikes their fancy.