I mentioned that, nor do they claim to be. But let's not forget Scientologists, Jehovah's Witnesses, Jews and Quakers. There are probably many more.
Quakers don’t believe in the Trinity? President Nixon was brought up in that religion. Aren’t Jehovah’s Witnesses a hard shell version of Seventh Day Adventists? Scientology is the 20th Century version of Mormonism and Jews never claimed to be Christians.