@u2764
> as christians have tried to differentiate themselves from judaism, even though at this point i think there are more than enough other differences
Oh!, I can cite something I think. It's an "It's not me, it's you" situation (or, well, "not you, it's me"? Depends if I'm talking as a Jew-who-it's-not or whether I'm putting the words in the mouth of a Christian.) --
"differentiat[ing] themselves from judaism" is an extremely useful and widely used rhetorical/philosophical maneuver WITHIN Christianity, when policing, purifying, and shoring up its internal boundaries/self-definition and borders of legitimacy. By taking some aspect they want to define out of "true Christianity" and expel from the bounds of legitimacy, marking it as Jewish -- "Judaizing", "legalism", "Pharisee", ... -- and attacking it in that legacy, they can echo and be backed up by similar efforts across history.
(Can also be done Western-secularly.)
cf. David Nirenberg's "Anti-Judaism: The Western Tradition"