Kdot, don't forget the Christian cross around De Rosa's neck. As he admitted to Romano at the end of book 1, Michael the Archangel slipped it around De Rosa's neck while he was distracted. It's essentially a chain around De Rosa that limits his powers, causes his excruciating stigmata when he kills clergy, and prevents Satan from leaving De Rosa's body. Thus, no whisking. I based my story's "chain" on the one used to chain up the dragon in Revelation.
-----
Some Spoilers Ahead:
Connor didn't kill the pope because he found he couldn't go through with it. That was to have been the culmination of everything his father had been working toward for two thousand years (i.e., for Connor to "become" Christ). If you remember, Connor lied to Romano and his father about having done it, although he later tells his mother the truth. Something about Connor prevented him from committing the assassination, although he doesn't know what.
That same "something" feeds his conscience, causing him to really question what he's doing. As Connor is shown real love by his mother and his mother's family (i.e., Connor's family), he begins to wish he could get out of the conspiracy, but he's in so deep, he doesn't know how. His grandfather has a heart-to-heart with him, telling him how the family had tried for years to get his mother to quit drinking, but they ultimately concluded she had to want it too, so they told her they would always be there for her, and that all she had to do was ask for help, which she finally did after she found Connor.
His grandfather then tells him the family would always be there for Connor too, until he was ready to ask for help. Connor decides he wants to try, so his grandfather takes him to church, telling him God has been waiting a long time for Connor to set foot on holy ground with righteous motives. Connor goes to confession (with Romano!), then truly prays to God at the altar for the first time in his life. He's told by God everything he has to do if he really wants out of the conspiracy, yet he's also told he will still end up in the Lake of Fire. Yikes! Of course, now Connor is even more conflicted. Among other things, he's supposed to destroy his father, a being he loves dearly, and yet, apparently, Connor is still doomed. Tough call. :-)
On a separate note, Connor is, of course, still pissed off at his father and God for creating him in the first place just to, in Connor's mind, simply settle the bet. He'll be quite a badass in the first half of book two, intentionally trying to piss off his father by *not* acting Christlike in front of important witnesses. It's going to be fun to write those parts.
Whatever it is that prevented Connor from killing the pope will continue to influence him until he learns the truth in book 3: God is unfolding a plan far greater than a simple bet with Satan. That plan was actually developed by someone else in Heaven looking to change the course of history.
As for whether it's murder for Connor to actually kill, not in this case, regardless of what he decides. First, God and Satan both agreed to let Connor make the life or death choice as to whom to kill. And, since it's the End Times, the Holy Trinity and the Unholy Trinity are now at war. Would it be murder for Connor to kill the leader of enemy forces during war? Would it have been murder for Connor to kill Churchill and Roosevelt during WW2? If yes, then would it also be murder for Connor to kill Hitler?
I'm dying to start writing this.