The salvation of God is a 'what' not a 'who'. Making it a 'who' is idolatry and is not scriptural.
Per scripture, the Jewish nation, in the future. Not only that, but it is 100% clear that Jesus CANNOT be the servant spoken of in Isaiah. Chapter 42, "he shall not cry, he shall not be broken". Ummm he cried on the cross "Lord why have you forsaken me". He was broken when he died. Chapter 49 it says "You are my servant, Israel". If you have actual scripture to cite on this go ahead, but Chapters 42 and 49 are out. The other reference to "light to the NATIONS" is in chapter 60, but no reference to the servent is there, so that chapter is out too.
Well. If the metric for evidence is set equivilent to the New Testament, absolutely. We have had miracles, healers, exorcists, saints, dead rising from the grave, all individual testimony, written stories passed down for generations.
My turn for a question, please. Let's say you're right about what the scripture is saying about spiritual blindness. Do you have any reasons to believe that this is still in effect today? The prophets could certainly be accurate in their place and time. The prophets may be correct about future events. But that doesn't mean it's happening now. The conclusion that it's happening now has not been supported.
Ok. Let me begin by attempting to answer your final question.
Is the blindness that the prophets speak about still evident in lsrael?
I take my lead, in responding to this question, from Hosea 6:1-3. It says, 'Come, and let us return unto the LORD: for he hath torn, and he will heal us; he hath smitten, and he will bind us up.
After two days will he revive us: in the third day he will raise us up, and we shall live in his sight.
Then we shall know,
if we follow on to know the LORD: his going forth is prepared as the morning; and he shall come unto us as the rain, as the latter
and former rain unto the earth.'
Those speaking in this passage are Ephraim and Judah (see ch.5), and they are responding to God, who had said (Hosea 5:15), 'l will go
and return to my place, till they acknowledge their offence, and seek my face: in their affliction they will seek me early.'
I understand that the 'days' in Hosea 6 refer to periods of a thousand years. The point from which we begin to measure the two days is from the expulsion of the Jews from their land (under the Romans). For roughly two thousand years the Jews are exiles, and 'revival' occurs when God allows Jews to return to the land of their ancestors. It is in the third day, of a thousand years, our present millennium, that God begins to raise up lsrael once again (to make them strong). It is 'then' that lsrael will again have knowledge of the LORD, and of his coming, but only if they 'follow on to know the LORD'. And the reference to rain is to the outpouring of the Holy Spirit [Jeremiah 31:33,34.]
What this passage teaches me is that lsrael does not have knowledge of God at the present time. If they did have knowledge, there would be no need to use the future tense in relation to knowing God. Furthermore, in Hosea 5:15, God's accusation against lsrael and Judah is that they have not acknowledged their offence, or sought God's face. So, l ask, how is one to recognise the face of God? How is one able to know God if his Spirit is not accessible? If you argue that God is not able to manifest himself both amongst men and within their hearts, then God remains an allusive and unknowable God. Having the written word is not enough. It must become a spiritual reality.
Summary: Yes, blindness still exists, but there is a softening of hearts and a thirst for knowledge of God. This knowledge can only be found in, and through, Christ.