Theological Question

I was talking religion and god with my mother today and something occurred to me regarding Christians vs. Muslims and Christians vs. Jews.

Now, I haven't studied religion and theology in depth, its not something I care to study, because I get confused by the layers and intricate lines and connections of it all.Knowing my ignorance, I still wonder...

Ok, so the Bible was written in the middle east. That means it was written by middle eastern men, yes? The first Christians were middle eastern. Jesus was a Jew. Middle eastern people were Jewish.

So when Christians say they strongly dislike or disagree with Jews (not to say that Christians hate them all, but rather that when I mention Jews and their beliefs to strongly Christians, I usually get a scoff and an eye roll in response.) and they hate middle eastern people for their beliefs and cultures, I get confused. I mean, wasn't Jesus middle eastern? Wasn't Jesus Jewish? Why do Christians hate the very thing that their worship figure is? Also, if Jesus is a Jew, why was Christianity made? Why not just follow Jesus's religion instead of making him the figurehead for a different religion? I just don't understand that.