Similarly, many are saying that the people responsible for the 9/11 attack are not true Moslems. In both cases, it comes down to semantics, who's defining what makes a "true" Christian or Moslem. The problem is, there's little in either the Bible (especially the Old Testament) or the Koran which would rule out killing large numbers of people in the name of God/Allah.
Half wrong, total nonsense. The Bible clearly shows how a saint of God can test those who he meets to know if they are in the faith or not. It also matters not whether someone is a "true" muslim. Unless they repent both will perish.