It might interest folks that some kind of archaeological evidence exists for mass 'disposal' of neonatal infants in the Roman period. One is from Ashkelon in Israel :
http://www.exn.ca/Stories/1997/01/17/03.asp
This might, or equally might not, mean that the slaughter of the innocents actually took place.
The Romans viewed Judaism and Christianity as one and the same - at the beginning of the first millenium it was fashionable to follow eastern mediterranean cults such as those of Osiris, Isis, serapis, Jesus, all the various Gnostic branches, and Judaeism, Mithras, and so on.
'The Romans' were polyglot and multicultural with two no-no's: pay your taxes and no human sacrifices, thank you. The latter was used to justify the wars against the Carthaginians; Christians and Jews drew themselves to the notice of local Roman authorities by refusing the annual homage to the emperor that marked you as a loyal ie tax-paying Roman.
Understandable I suppose as this involved making a token sacrifice (a pinch of incense) to the god-emperor.
I've gone on too long, time for me cocoa.