BJ Colbert said:

Oh dear Petra, how would you feel if someone said that about your religion, not nice at all. I love you, but it is difficult to hear you call me satanic and not feel a bit queasy. How do you put yourself as judge of who is satanic? . . . I hope I may have clarified our beliefs a tiny bit in your mind.
At least to the point where you won’t consider Mormons to be Satanic, simply because you don’t believe the same as we do. That is a very poor description of a group of very faithful followers of Jesus Christ. Charity Never Faileth

BJ
No, no, BJ! I am not saying you are satanic or any other person for that matter. Please understand I am talking objectively about the teaching of the Mormon Church. There may be spiritual consequences for these teachings, but it is not my place or desire to judge individuals.
The theology is dangerous because at its core, the Mormon gospel is the sin of Lucifer – wanting to become a god. The core of any religion is the definition and plan of salvation. The primary objective in Mormon salvation is eternal progression to the highest level of the Celestial Kingdom—to become God and Heavenly Father (or Mother) to a planet of people. The objective is to become what the God of our Earth is. Make no mistake! This is the sin of Lucifer! And it is for this reason that Mormonism is fundamentally satanic.
Yes, the Mormon Church appears very Christian in its terminology morality, and activities. And there are so many, many sincere and good people in the Mormon Church. I have known many, and I have no doubt that you are just as nice. But I would encourage you to consider the foundation of Mormonism and think about the implications of seeking eternal progression. I cannot judge and do not wish to. I’m just stating the facts about the Biblical account of Satan’s fall and the primary objective of Mormonism.
I do not raise this issue because Mormonism is a view different than my own. I am very open minded and love Truth more than my own opinion. This love of Truth forced me to reconsider 22 years of what I thought was a water-tight theology. Up until 3 years ago, I was a Calvinist Protestant, and I am now a Catholic. It was a painful transition and I am still struggling with a couple of issues, but history, an unbiased reading of scripture, and the conclusion that the apostolic deposit of faith continues through the Catholic Church has led me home. So I don’t expect more open mindedness of others than I require of myself.
How would I feel if someone said this about Catholicism? I expect others (especially those who love me) to be perfectly honest with me. If a friend of mine honestly thinks that the Catholic Church is satanic, I would want her to discuss it with me. No, I would not be offended. It would be an opportunity for us both to come closer to the Truth. Truth is not owned. It is discovered. If we all seek Truth with little regard for our own opinion, we will find it indeed.
I love you, too, BJ! Please consider what Mormonism is based on. Please look at the real reason Satan fell. The Mormon church says that Lucifer and Jesus were spirit brothers. Jesus was selected by Heavenly Father to be the savior of the world. Lucifer got upset and rebelled against God because he wanted to be savior. That is the Mormon account of his fall and transformation into Satan. It was a sibling rivalry.
But the Book of Isaiah has a much different account. Lucifer, referred to as the “star of the morning” and previously the greatest angel, was jealous of the Most High. He wanted to raise himself above God Eternal and become like God. This does not mean that he merely wanted to have attributes of holiness like God. He wanted to be a God. He also wanted to be worshipped. When he tempted Jesus in the wilderness, he demanded that Jesus bow down to worship him. Of course, Jesus didn’t. But ever since his fall, he has wanted the worship that is due God. And I believe it gives Satan great pleasure to pursuade people to view God as a created being that progressed into His current god-state. He wants to demote God because that elevates himself. And I also believe it gives Satan great pleasure to pursuade people to think they, too, can progress to that god-state. The worst sinners make great efforts to get others to commit the same sins.
I’m tellin’ ya. This is scary. Very scary.