When did Christianity become a separate religion from Judaism?
               
                
                As best we can determine, the Jesus Movement began as a sect within 
                Judaism and spread throughout the Mediterranean region largely 
                by being passed from one Jewish community to another. Jesus, of 
                course, was a Jew, as were his original disciples. He apparently 
                saw his ministry as leading his people to higher ground, as it 
                were, not launching a competing movement.
              His 
                followers believed Jesus to be the Messiah promised by the Hebrew 
                Scriptures. The Jewish religious establishment was at least somewhat 
                threatened by Jesus' teaching, although the extent of their opposition 
                might have been overstated by early Christian writers such as 
                the authors of Matthew and John. 
              As 
                the Jesus Movement spread and came into contact with other influences, 
                such as Greek philosophy and Roman cultural centers outside Judea 
                and Syria, the movement felt a growing need to differentiate itself 
                from other religions and philosophies. They did so in the time-honored 
                practice of declaring their views true and other views false. 
                At the same time, Rome was engaged in ruthlessly repressing Jewish 
                revolts. Some Jesus people interpreted those devastating attacks 
                as further signs of their rightness. 
              By 
                the time the followers of Jesus thought of themselves as “Christians,” 
                they were at odds with their former Jewish brethren, at odds with 
                imperial Rome, and at odds with various movements within their 
                own circle. A hierarchy of power emerged, justified itself as 
                ordained of God, continued the work of self-differentiation, and 
                began branding as heresy any view or practice that contradicted 
                the hierarchy. In time, as Christianity launched its own empire, 
                repression of Jews became standard practice, as it had been for 
                imperial Rome.
              As 
                time went on, Europe's Jews came to be seen as entirely different 
                from Christianity, a convenient scapegoat for embattled leaders. 
                That perceived gap remains wide. And yet Christians study the 
                Hebrew Scriptures and consider them authoritative, Christian worship 
                employs standard elements of ancient Jewish practice (book, cup, 
                bread, stole, oil, candle, priest), and except where anti-Semitism 
                is virulent, Christians understand pogroms and the more recent 
                Holocaust as evil.