Don DeGrasse's Holocaust Denial

Don DeGrasse came into prominence after 9 11 when he had a marathon symposium. He claims that one of his good friends was part of the Nebraska air guard that shot down United 93. Alex is saying he's read Don's work, which leads me towards the conclusion that Alex is aware of Don's Holocaust denial and anti-Semitism. Or he's lying about having read any of his stuff and is just willing to have this guy with a wacky name.