Idea: Christ's Crucifixion Was A Result Of, Or Action Against, The Outsiders

We know that items pertaining to Christ's crucifixion are back in play as weapons against the Outsiders. And belief holds that Christ gave his life to absolve humanity of their sins, right? Well, what if we changed 'absolve humanity of sin' to 'protect humanity from Outsiders'?
It would fit that God's son gave his life to protect humanity and, in so doing, created items that can be used explicitly to fight the Outsiders he was striking back against.
Heck, I would not be surprised if Judas was working with the Outsiders to kill Christ, possibly in a ritual aimed at God, but Christ turned it around and made a willing sacrifice to protect the world. I mean, why else would items of faith have power against Outsiders when there's not a whole lot of people believing they would?

Put in spoilers because I'm referring to Goodman grey.

In Turn Coat, Bob says 'They don't need to recombine DNA' and that they don't have a gender, when Dresden asks if the Shagnasty is a He.
..If that is the case, how did Goodman Grey become the scion of one?

It's always kind of bothered me.