The song near the end is Mark Knopfler of Dire Straits playing "Brothers in Arms" from their CD of the same name.
The Latin cathedral rant and its translation :
"Gratias tibi ago, domine. Haec credam a deo pio? A deo iusto, a deo scito? Cruciatus in crucem. Tuus in terra servus, nuntius fui. Officium perfeci. Cruciatus in crucem. Eas in crucem!"
"I give thanks to you, O Lord. Am I really to believe that these are the acts of a loving God? A just God? A wise God? To hell with your punishments. I was your servant here on Earth. And I spread your word and I did your work. To hell with your punishments. To hell with you!"