That is why they choose to be known as Christians.
Remember, Christ was a Jew.
Ask any Christian if they are Christ, the definitive answer is NO! Ask any Jew if they are Christ, the definitive answer is NO!
Both groups equally reject Christ as an identity, that is, as one's SELF. This defines them. There are 101 ways to reject Christ as one's SELF. "I am a Christian", and, "I am a Jew" are two ways to deny Christ.
Christ (Jesus) was not a Jew, because he accepted the fact that he was Christ. No Jew, nor any Christian, accepts the fact that their soul (their true Self) is Christ.
Jesus path to knowing he is Christ is not taught by any Jewish traditions. It was taught, at that time, mainly in the east, in an underground version of Hindu called Advaita Vedanta. It teaches that the Self, the true Self, is one with, the same as, equal to the Most High, which, in that tradition is called Brahman. Nothing in Jewish tradition comes even close to this, which explains why most of the friction against Jesus comes from those among the Jews who knew their traditions/scriptures the best (scribes, Pharisees, lawyers). Any such notion that one is the Most High is, in Jewish tradition, blasphemy. So no, he was not a Jew ideologically, although he may have shared some bloodline, which means nothing and matters not at all.