A Mormon called David left this comment on my blog:
"Yes but the major difference between the Church and the sect is that polygamy was revoked in 1890 and the FLDS dissented and chose not to follow the new prophecies. So, no, we're not the same church because they left. They are not Mormons."
David, they follow the teachings of Joseph Smith and Brigham Young. Therefore why are they not Mormons?
Also, I would have to challenge you on your claim that polygamy was revoked in 1890.
It was taught when I was a Mormon that polygamy had only been suspended by the 1980 Manifesto and that it would be reintroduced "in the fullness of time." Along with animal sacrifices in the Mormon temples, another teaching that I found somewhat batty, to be honest.