Student Sondra Hegstrom, 17, told the Minneapolis Star Tribune that Weise was into Goth culture, wore "a big old black trench coat," drew pictures of skeletons, listened to heavy metal music and "talked about death all the time."
http://msnbc.msn.com/id/7259823/
It's that damn rap music haha.
Seriously though, it seems from the article that he shared Hitler's belief in racial purity, but as it applied to Indians instead of Aryans. So the philosophy is what he agreed with:
He shared the Nazi goal of racial purity, saying that when he talked in school about that for his own Chippewa tribe, "I get the same old argument which seems to be so common around here. 'We need to mix all the races, to combine all the strengths.'"