In Jesus we see the suffering of both God and humanity when God's desire for closeness is frustrated. In Holy Week we see that God's Love can live in the tension of desire and suffering.
Remember: We are trained by the world to believe that love is conditional and binary. So, if we are good to God, God will love us, and if we are bad to God, God will hate us. If we make Jesus suffer, then how can he still desire us? If we do not act lovable, how can we be loved? In this mindset, Jesus' passion seems impossible to us. We stand before the cross stupefied by the idea that anyone could call this Friday "Good".