Isn't this begging the question? You've determined what the criteria are and determined that JW's and Mormons are not Christians based on your determination. You've claimed I'm wrong and they are not Christians based on what you deem necessary to be a Christian.
All I have said so far is based on historical, orthodox Christianity. I will continue to say that
who Jesus is is central to salvation. We simply
cannot make Jesus out to be whomever we want and be saved.
Who brought the Gospel to save mankind? Wasn't it Jesus? Nowhere in Scripture did He go around preaching believe that I'm going to die for you sin and you'll be saved. Nowhere do we find Him preaching, believe that I am going to resurrect and you'll be saved. Instead what we find Him preaching and teaching is the Kingdom of God. What did Jesus say would be the foundation of His church, believe I'm going to die for your sins? No, that's not what He said. He said the foundation of the church would be the confession Peter made when asked who do you say that I am?
16 And Simon Peter answered and said, Thou art the Christ, the Son of the living God.
17 And Jesus answered and said unto him, Blessed art thou, Simon Barjona: for flesh and blood hath not revealed it unto thee, but my Father which is in heaven.
18 And I say also unto thee, That thou art Peter, and upon this rock I will build my church; and the gates of hell shall not prevail against it.(Mat 16:16-18 KJV)
If Jesus preached the gospel, yet He didn't preach, believe I'm going to die for your sins, how were people saved? I would seem, apparently, that they didn't believe He was going to die for their sins since they didn't know about it, yet they were saved. What they believed was that He was the Christ, the promised Messiah of the OT Scriptures.
Of course they didn't believe he was going to die for their sins. They expected a military campaign to set them free from the tyranny of Roman rule. Can you prove that any were saved solely based on believing Jesus was the Messiah? It sure isn't in the passage above. It seems your answers are still far too narrow. You are focusing on one passage at a time as though it says all there is to say on a matter. This is not good practice.
Rom 10:9 because, if you confess with your mouth that Jesus is Lord and believe in your heart that God raised him from the dead, you will be saved.
Rom 10:10 For with the heart one believes and is justified, and with the mouth one confesses and is saved. (ESV)
Do you agree or disagree with Paul here?
I would argue that the very term "Son of God" was understood by the Jews to mean that he was, in fact, God in nature--"they shall call his name 'Immanuel' (which means, God with us)" (Matt 1:23, ESV). He was the very embodiment of Israel's God.
We also shouldn't forget other things Jesus said:
Joh 3:5 Jesus answered, "Truly, truly, I say to you, unless one is born of water and the Spirit, he cannot enter the kingdom of God.
.....
Joh 3:14 And as Moses lifted up the serpent in the wilderness, so must the Son of Man be lifted up,
Joh 3:15 that whoever believes in him may have eternal life.
Joh 3:16 "For God so loved the world, that he gave his only Son, that whoever believes in him should not perish but have eternal life.
Joh 3:17 For God did not send his Son into the world to condemn the world, but in order that the world might be saved through him.
Joh 3:18 Whoever believes in him is not condemned, but whoever does not believe is condemned already, because he has not believed in the name of the only Son of God. (ESV)
Seems that Jesus here is implicitly, if not explicitly, stating that salvation will be through his death and resurrection.