No you did not
You assumed a meaning and did not respond to different interpretations or how your interpretation is contrary to both old and New Testament scripture
John 12:40 (KJV 1900) — 40 He hath blinded their eyes, and hardened their heart; that they should not see with their eyes, nor understand with their heart, and be converted, and I should heal them.
God blinded men to prevent their belief. Why would God blind someone who had no ability to see?
Why prevent from believing those who had no capacity for belief
Luke notes had men not grown hardened they could have believed
Acts 28:27 (KJV 1900) — 27 For the heart of this people is waxed gross, and their ears are dull of hearing, and their eyes have they closed; lest they should see with their eyes, and hear with their ears, and understand with their heart, and should be converted, and I should heal them.
Jesus clearly states he hides truth for some as otherwise they would repent and be forgiven
Mark 4:10–12 (ESV) — 10 And when he was alone, those around him with the twelve asked him about the parables. 11 And he said to them, “To you has been given the secret of the kingdom of God, but for those outside everything is in parables, 12 so that “ ‘they may indeed see but not perceive, and may indeed hear but not understand, lest they should turn and be forgiven.’ ”
unregenerate men are shown to receive the word with joy and believe
Luke 8:13 (KJV 1900) — 13 They on the rock are they, which, when they hear, receive the word with joy; and these have no root, which for a while believe, and in time of temptation fall away.
Second you assume Deut 29:4 means what?
They needed a change to their being before they could understand or see?
Or God had not explained the significance of the events when he led them out of the desert?
Or they had not yet come to understand. but would as God would teach them through various trials and discipline see in Ch 30:1-10.
Through this they would learn their proper way to relate to God and alternate sources which would seek to take the place of God
The first understanding which you would affirm would be contrary to the verses posted so it cannot be right
It is also contrary to what we see in the very next chapter
Deuteronomy 30:11–20 (KJV 1900) — 11 For this commandment which I command thee this day, it is not hidden from thee, neither is it far off. 12 It is not in heaven, that thou shouldest say, Who shall go up for us to heaven, and bring it unto us, that we may hear it, and do it? 13 Neither is it beyond the sea, that thou shouldest say, Who shall go over the sea for us, and bring it unto us, that we may hear it, and do it? 14 But the word is very nigh unto thee, in thy mouth, and in thy heart, that thou mayest do it. 15 See, I have set before thee this day life and good, and death and evil; 16 In that I command thee this day to love the LORD thy God, to walk in his ways, and to keep his commandments and his statutes and his judgments, that thou mayest live and multiply: and the LORD thy God shall bless thee in the land whither thou goest to possess it. 17 But if thine heart turn away, so that thou wilt not hear, but shalt be drawn away, and worship other gods, and serve them; 18 I denounce unto you this day, that ye shall surely perish, and that ye shall not prolong your days upon the land, whither thou passest over Jordan to go to possess it. 19 I call heaven and earth to record this day against you, that I have set before you life and death, blessing and cursing: therefore choose life, that both thou and thy seed may live: 20 That thou mayest love the LORD thy God, and that thou mayest obey his voice, and that thou mayest cleave unto him: for he is thy life, and the length of thy days: that thou mayest dwell in the land which the LORD sware unto thy fathers, to Abraham, to Isaac, and to Jacob, to give them.
thus should be ruled out
Now had you read you should have seen your understanding of what is being stated is defective or at least tried to address the objection
they are hostile witnesses against him hence the strawman.
