I haven't yet seen, or been shown, any texts from the Tanach that undermine my belief, arrived at after much study, that Jesus must be the Messiah.
Let's take an issue that clearly offends you - that of a virgin birth. You will, no doubt, want to refer to the translation of Isaiah 7:14 and say, as the JSB says, 'Look, the young woman ('almah') is with child and about to give birth to a son. Let her name him Immanuel ['God with us'].
Now let's give this some thought. You believe in a personal messianic figure. You believe he must be descended from Abraham [Genesis 12:3], through the Davidic line [2 Sam. 7:12-15], born in Bethlehem [Micah 5:2], a King of Israel [Psalm 2], and a priest [Psalm 110].
If God is to choose a mother to bear the Messiah he will clearly want to follow the very law he provides in Leviticus 21, 9-15. Yes, this law applies at an individual and national level. Leviticus 21:13, 'And he shall take a wife in her virginity' or JSB, 'He may marry only a woman who is a virgin.'
Now I'm fully aware that God is not marrying the mother of the Messiah, but it's quite clear that God would apply the same principles when choosing a woman as the righteous mother of the Messiah as he does when talking about a High Priest taking a wife. It is therefore quite reasonable to say that in choosing Mary, God would choose a young woman who was also a virgin.
Now, you wonder, why is it necessary to have a virgin conception? For the very reason that the baby is then genuinely the son of God. This is prefigured in the story of Abraham and Isaac. But Jesus still has a human gestation and birth, and his upbringing is under the law without miraculous power. It is only at the age of about 30 that he receives the anointing of the Holy Spirit and the approval of his heavenly father, 'Thy art my beloved Son, in whom I am well pleased.'