What do you think about these statistics?

Define "Christian". I say this because I see questions about how Mormons, Jehovah's Witnesses, and Catholics are non-Christian. These groups, listed above, would be "self-identify as Christians". The Roman Catholic Church with 65 million members, is the largest denomination in the US, the Mormon Church (5.8 million) is the fifth largest denomination in the US. What this means, is, if these groups are "non-Christian", that 85% will drop dramatically.