They're considered conservative Christians for many reasons. They strictly follow their teachings, which includes both the Old Testament and the New Testament as well as the false narratives. Criticism of their Church or leaders likely leads to excommunication for any member. I'm pretty certain they require one year serving as a "missionary", which might be why so many boys dressed neatly in black dress pants and white dress shirts ride around on their bikes, promoting their religion. There's more.

But you're correct in that they are cult-like. They don't like outsiders. They baptize people long dead, even having been baptized in another faith while alive. Partly to assuage living descendants who are Mormon... but maybe to boost numbers of recorded Mormon baptisims? The special diaper.... errr, underwear, which has to be worn at baptism. The special name given a member at baptism.