Actually, Jews were one tribe of the (Christian) House of Israel, anticipating Christ's arrival. When He, the Messiah arrived, they rejected Him, splintering from the (Christian) House of Israel. Then, they conducted the first holocaust against their own people for accepting Christ as the Messiah. Later, their descendants were to be saved from another holocaust by the nation founded by men seeking to worship Christ freely, America, 2,000 years later. America has no obligation other than brotherly love toward Israel and Her lost, reorganized (Christian) House of Israel, tribe of Judah brothers and sisters.
Christianity is the oldest religion, with Judaism being the oldest Christian splinter group, followed by Islam the modern pagan religion that remains as a thorn to keep Christians humble.
Excuse me? It's possible that you may want to rethink that.
I believe that Judiasm came before Christianity.
Well, that's quite a story you have there. The only problem is its complete and utter disconnection with reality.
Uhmmm, I believe the Jews were actually part of the House of Judah, from whence came the name Jew. The House of Israel was long since (~721 BC) removed from the scene, to become the "10 lost tribes of Israel". But that's another story...
The Old Testament is the story of G_d's attempts to cultivate His people (The House of Israel) in the gospel of the Atonement amongst the weeds of paganism. In the Old Testament, in anicipation of Christ, Christ is referred to as the coming "Messiah". This is a difference in language, rather than theology.
Ancient Jews were Christians (Would you feel better referring to them as Messiahanists,instead of ancient Christians?) waiting upon the Lord's arrival whom they referred to as "Messiah". Unfortunately, Jews rejected Christ as their "Messiah", effectively turning away from the prophecies of all of their ancient Old Testament prophets. In so doing, Jews splintered from their ancient Christianity creating their own religion, referred to today as Judaism.
Referring to Judaism as being older than Christianity, proves that you don't understand modern Christianity's connection to the House of Israel, or the House of Israel's (represented by the only remaining tribe - Judah, at the time of Christ) anticipation of Christ's arrival and atonement of the sins of those who came before Christ (them) and after Christ (us).