When word gets out they are going to blood a Mithras priest, every satanist for a million miles wants to be there. So for me it was like a diabolical homecoming, every nightmare manifest, every abuser present.
When I saw Walt I thought "oh thank God, someone who isnt a freak" then I noticed how he was dressed. He noticed that something had made me upset and he grabbed hold of me and I honestly think he believed he was going to stroke my hair and tell me that everything was going to be ok, but they had reversed his thinking and distorted his actions.
I wasnt skilled enough at that time to realize fast enough that the more upset I seemed the more he would try to comfort me and the more he would try to comfort me the closer he would come to consumating the act of sacrifice.
So I lacked the skill not to have to kill him.