John 9:5 has been translated basically two different ways.
Rom 9:5 (KJV),
Whose [are] the fathers, and of whom as concerning the flesh Christ [came], who is over all, God blessed for ever. Amen.
KJV and others make, "God blessed for ever" a separate doxology to God.
Punctuation is key, Rotherham's Emphasized Bible translation:
"Whose are the fathers, and of whom is the Christ––according to the flesh––he who is over all, God, blessed unto the ages."
The Scriptutures (ISR) With Footnotes:
"whose are the fathers, and from whom is the Messiah according to the flesh, who is over all, Elohim-blessed forever."
Then there are others, including the one you quoted, that do appear to say Jesus is God.
Rom 9:5,
Theirs are the patriarchs, and from them proceeds the human descent of Christ, who is God over all, forever worthy of praise! Amen.
What are we to think about such different translations? Do we just accept the ones that fit with our belief while outright rejecting the others without further consideration? Is our choice based solely on what we already believe?
All of these interpretations were done by people who are equally well versed in the Greek language. I'm not an expert in Greek (just 2 years at Emory University), but I do know enough to see that there is a certain amount of ambiguity in the Greek of Romans 9:5. Nonetheless, I think the fact that there is such a wide disparity in translations among others much more versed in Greek than myself also indicates that the original text is somewhat unclear.
How do we solve the issue? Well, a good starting point is to recognize two points:
- Romans 9:5 is not the only verse in the Bible
- All the other verses must fit with Romans 9:5. God can not contradict Himself
Which translation of Romans 9:5 do you see as fitting with the following:
1Cor 8:6,
But to us [there is but] one God, the Father, of whom [are] all things, and we in him; and one Lord Jesus Christ, by whom [are] all things, and we by him.
John 17:3,
And this is life eternal, that they might know thee the only true God, and Jesus Christ, whom thou hast sent.
I've never heard anyone claim Jesus is the Father. Nor have I seen that anyone sent God anywhere.
John 20:17,
Jesus saith to her, Touch me not; for I am not yet ascended unto the Father: but go unto my brethren, and say to them, I ascend unto my Father and your Father, and my God and your God.
Jesus had a God, the very same God as Mary Magdalene. So Jesus, being God, means God had a God! Who might that be? But that's not the only verse that says God (assuming Jesus is God) has a God. You can find several more. Here's just one:
Eph 1:3,
Blessed [be] the God and Father of our Lord Jesus Christ, who hath blessed us with all spiritual blessings in heavenly [places] in Christ:
Was Jesus tempted? Sure he was. Can God be tempted? The scriptures say no. I see no need to quote the verses on that, I'm quite sure you know the ones to which I am referring.
There are many other clear verses that would seem to be at odds with the translation of Romans 9:5 you quoted. As far as I can tell, none of those clear verses are at odds with the KJV translation, and those like the KJV.
So there is some of the evidence, but it should,or at least could, be enough to reach a verdict as to which translation is closer to the truth. I'm not saying Jesus is not God. I'm just pointing out a few verses.
The main thing I'm trying to say is that all verses must either say Jesus is God or that he is God's son. Accepting the normal meaning of words and language, would preclude a son from also being his own father. I know that with God all things are possible, but that verse has a context. Taken out of context, that verse can be used to justify any idea whatsoever that someone can conjure up. A slippery slope if there ever was a slippery slope!