Anybody whose mother is a Jew is also a Jew, Jesus was 100% a jew. Well, "is", since you are a believer. While his followers would not be considered Jews, he most certainly was a circumcised, passover celebrating, jewish kid who even went to synagogue. Seriously, learn your bible if you want us to believe you are a believer. Shoot the Last Supper was a Passover meal. You have to be imbecilic not to understand that he was Jewish.
Well, I guess you could argue that while he lived and died a jew he "resurrected" as something new. So, yeah, "is" may not be the right word.