Is not the cup of blessing which we bless a sharing in the blood of Christ? Or do you think it is the cup of wrath in which we share? What did Jesus say? "My cup you shall drink."Which the scriptures plainly state is the wrath of God directed towards sin!
Even when the disciples drank that cup it was not the cup of God's wrath. Scripture teaches that God is never wrathful towards the righteous. Scripture also teaches that God is immutable, He does not change.
It is your theory, not Scripture, that has God being wrathful towards Christ.