[Zakeet]

Does not LDS Doctrines and Covenants describe Elohim’s other “spirit” children, including Lucifer (called Perdition), making him a brother of Jesus?

The Mormon Church's teachings on the relationship between Jesus and Lucifer are clearly explained, along with annotations, here.

That, if true, seems to mark a huge difference between orthodox Christianity and LDS beliefs.

That is just one of many fundamental differences between Mormonism and Christianity. You can see a description of a few more issues here.

[DelphiUser]

hoppity, Please be aware that anyone who quotes from the Tanners is quoting from someone who has sworn to destroy our church. Please pray about all you will be asked to read here, and follow the spirit.

I would also suggest you ask people to identify their position, Mormon or not Mormon, I am a Mormon.