Then you are making up a Jesus that suits you. Jesus HIMSELF SAID that he was a Jew, and I've quoted him twice. I'll quote him again, speaking words directly out his own mouth to a woman: "we worship what we do know, for salvation is from the Jews." We. We Jews. We Jews worship what we Jews know.
Right there Jesus self-identified as a Jew. Are you just going to ignore Jesus and assert that you know him better than he himself did?
Yes, you are. Because your understanding of Jesus is different, and these words of his don't fit it, so you discard them. Nobody can stop you. In this day and age nobody is going to haul you off and burn you alive or anything (though Christians past of various denominations would have been all to happy to do so, because many were evil thugs).
Nevertheless, Jesus said he was a Jew, so he was a Jew, and your belief that he was not is wrong.