Antisemitism predates Christianity as well. It was around in Greek and Roman times. I might add to your support of Judaism that wherever the Jews are, there is a great influx of arts and culture. They lead the way in academic scholarship, scientific advancement, business and commerce, civil rights and social justice, etc etc. All the values inherent to a civilized society. Moreover, Jews have lived in Europe as long as Christians have. There was a massive synagogue in Prague as early as 1200 C.E. So aren’t they just as much a part of ‘us’ as anyone?