By a certain age we all supposed be mature adults who know the difference between truth and fiction.  Mr. Boyden was quite unambiguous for many years.  But the truth is that he is not indigenous.  So lets call a spade a spade.  When he originally claimed, without qualification, to be indigenous, he wasn't wishing it was true.  He wasn't feeling like he had bonded with indigenous culture.  He was lying.  Plain and simple.