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Do you need to believe Jesus is God to be saved?
One must want Jesus as LORD above everything else, then God will open their mind and heart to the Gospel of Christ in its fullest. If they diligently study the scriptures and avail themselves of the Teachers God has gifted the church.
11 And he gave some, apostles; and some, prophets; and some, evangelists; and some, pastors and teachers;
12 For the perfecting of the saints, for the work of the ministry, for the edifying of the body of Christ:
13 Till we all come in the unity of the faith, and of the knowledge of the Son of God, unto a perfect man, unto the measure of the stature of the fulness of Christ:
(Eph. 4:11-13 KJV)
No child of God will reject the doctrine of the Holy Trinity, after they are born again.
If anyone rejects Christ is God the Son, they are NOT one of His sheep. We have an eyewitness account of this truth:
23 And Jesus walked in the temple in Solomon's porch.
24 Then came the Jews round about him, and said unto him, How long dost thou make us to doubt? If thou be the Christ, tell us plainly.
25 Jesus answered them, I told you, and ye believed not: the works that I do in my Father's name, they bear witness of me.
26
But ye believe not, because ye are not of my sheep, as I said unto you.
27 My sheep hear my voice, and I know them, and they follow me:
28 And I give unto them eternal life; and they shall never perish, neither shall any man pluck them out of my hand.
29 My Father, which gave them me, is greater than all; and no man is able to pluck them out of my Father's hand.
30 I and my Father are one.
31 Then the Jews took up stones again to stone him.
32 Jesus answered them, Many good works have I shewed you from my Father; for which of those works do ye stone me?
33 The Jews answered him, saying, For a good work we stone thee not; but for blasphemy; and because that thou, being a man, makest thyself God. (Jn. 10:23-33 KJV)