If rightousness could have come through the Torah, then Christ died for nothing (Galatians 2:21)
But if there be no resurrection of the dead, then is Christ not risen:
And if Christ be not risen, then is our preaching vain, and your faith is also vain.
Yea, and we are found false witnesses of God; because we have testified of God that he raised up Christ: whom he raised not up, if so be that the dead rise not.
For if the dead rise not, then is not Christ raised:
And if Christ be not raised, your faith is vain; ye are yet in your sins.
(1 Corinthians 15:13-17)
These verses explain the reason for the continuing opposition to Jewish theology. According to Paul, Jesus Christ had to die in order to be resurrected.