Yonah did a good job, considering he was debating the losing side. I didn't post much about the arguments while the debate was going in order to watch it progress naturally, but now I will add my two cents on some of the arguments he used.
What they were not told
what they have not heard
(Isaiah 52.15).
What happened when Yeshua went before the rulers, first at the Sanhedrin, then Pilate, Herod and Pilate again? He confounded them so much that they didn't know what to do with him. All of them knew he was innocent. None wanted to be accountable for his death. Not even the Jewish leaders, who roused the mob to cry "His blood be on us and our children".
He had no beauty or majesty to attract us to him
(Isaiah 53.2).
Yonah blurs the line here between no beauty and ugliness. Some people are especially attractive, and people all turn to look when they walk in. Does that make everyone else repulsive? Of course not. Yeshua was an average looking person, not like a mighty warrior or king. He spoke directly to people's hearts and souls. People heard the truth, and those who could accept it, followed him.
Familiar with pain
(Isaiah 53.3). The word pain here seems to have been inserted by the NIV translators to make the text even more clearly favor the Yeshua interpretation. The Hebrew word is ḥṓlî חֹלִי (choli), which means sickness and not pain.
Psalm 103:2-3
2 Bless the Lord, O my soul,
and forget not all his benefits,
3 who forgives all your iniquity,
who heals all your diseases,
Matthew 8:16-17
16 When the even was come, they brought unto him many that were possessed with devils: and he cast out the spirits with his word, and healed all that were sick:
17 That it might be fulfilled which was spoken by Esaias the prophet, saying, Himself took our infirmities, and bare our sicknesses.
He will see his offspring and prolong his days
(Isaiah 53.10).
"The word zera is what is used of offspring, and that is never used to refer to spiritual children (so-to-speak)"
Not quite correct. And disproven in Isaiah, of all places.
Isaiah 57:4
4 Against whom do ye sport yourselves? against whom make ye a wide mouth, and draw out the tongue? are ye not children of transgression, a seed of falsehood.
The rest of the 'seed' argument, earlier made by Tovias Singer, is taken apart here:
Answering Judaism: Seed of Isaiah 53:10
Enough for one post. Now to see if anyone reads it.