The Sin of Guido

Guido is in hell; for his deception sapped Palestina's walls.
Ulysses and Guido had both purged cities
So deception gained the walls. 
Ulysses Troy and Guido Palestina;
Then they slaughtered and utterly destroyed.
Ulysses used the Trojan Horse;
Guido the Papal Promise.

Yet, Dante, remember who was right in their war.
The Pope wished to unify Europe and end the bloodshed.
So with Ulysses he defended the right of the marriage vow.

Tom, the sluggish Prufrock...
Did he gain his lover through deception?