Telling such folks the Truth of Christ just hardens their hearts by giving the spirit that influences them another opportunity to provide them little positive ego strokes, especially those folks who behave like a little Furby named Cry Daddy. They want to be their own religion of Self so let them swallow their own poison.
Matthew 18:17 And if he will not hear them: tell the church. And if he will not hear the church, let him be to thee as the heathen and publican.
A denial of the deity of Christ is part and parcel of the fantasy of "Scripture Alone" since it is a fantasy that always eventually leads to accepting a heresy within which is a denial of the deity of Christ, whether those who profess "Scripture Alone" realize they're accepting that denial or not. Some such folks have the sort of ego that really enjoys rewriting Scripture, even words from the very mouth of Christ Himself, in order feed to ego of the Most High and Holy Self they worship. Others simply do not realize what they're accepting and have been blinded by a strong delusion sufficiently to not recognize the heresy intrinsic to what they accept.
In either case:
Titus 3:10 A man that is a heretic, after the first and second admonition, avoid:
Titus 3:11 Knowing that he, that is such an one, is subverted, and sinneth, being condemned by his own judgment.
Those who continue to deny the deity of Christ can fool themselves however they like, but they should get used to the idea of hearing, "I never knew you" from the very Jesus Christ they deny is God. Unless and until such an individual surrenders to Christ showing them the Truth in the Scriptures is just throwing pearls before swine.
When you can actually form an argument rather than a rant that is based upon the false assertion that Rome is the one true church, and which ignores my refutation of that, then you can get back to me.