(Breaking this down to different sub-topics)
- Scripture (both the Bible and other books LDS Christians consider to be scripture) plainly proclaim the divine Sonship of God. He's not the Father-- they are two different persons, but both are God. The Spirit is a third divine person. I'll have another post here in a few minutes citing a bunch of verses about that.
- If you don't believe the Jesus is the divine Son of God, then you can't be an LDS Christian (belief in his Sonship is required), but that doesn't mean your love of Christ or standing as a Christian is in any way denied-- loving Christ is still something to be celebrated! Obviously there's major disagreements on foundational theology. And you as a person should be treated with love and respect.
- Even if you don't believe in Christ at all (non-Christian or even non-religious) you as a person should be treated with love and respect. Every person has the right to believe according to the their own conscious. That respect is so important to LDS Christians it's literally in the Article of Faith (which are considered scripture)
Article of Faith 11
- As a group: The "anti-cult" movement is a Protestant thing, not LDS Christian-- in fact "Mormons" are the favorite targets of the "anti-cult" movement. LDS Christians don't hold classes teaching "this is what other people believe and why it's bad", rather teach that we should respect other people's beliefs (again, it's literally an Article of Faith).
- I personally have studied many faiths because I'm a nerd that way. I study by attending X services, asking X members their beliefs, reading their literature with them etc. Very diligent first-hand studying. My definition of a "cult" has nothing to do with whether or not you accept Christ, but how they operate. A cult foundaitonally employs fear-based tactics of "us vs them", threats, encourages attacking others, cutting off family members, and only following what the leaders say rather than individual thought, etc. I actually find the "anti-cult" movement to be a cult itself, as well as the JW. I've found individuals with a cultic mindset in a about every group (human fallacy).