CPS has a fairly good reputation around here for acting quickly when it is obvious the entire family is impaired, as the mother and grandmother showed by their acts and comments.
I too found the reference to the biblical story of Abraham and Isaac disturbing.
There are enough issues at hand here to discuss and debate without bringing up a story that has, at the very least, multiple layers and pages upon pages of interpretations, theological references, and inherent debates--as well as its historical setting.
Probably one of the most distressing things about this story is that the family appeared to look like any other tourist group.
Also, I'm glad in some ways he was delusional or stupid enough to try this way of harming the child, if he had just suffocated the poor baby in the night, he might have gotten away with it.