Hamas-Israeli war: What lies behind it

I born and raised in Israel. Like most Israelis, I was brought up to believe that all non-Jews hate us, because they are jealous that we are the chosen people and because we are the best. I was warned that I had to be careful of Germans (because they are all Nazis) and of Arabs (because even if they are nice, at the end of the day, they will stick a knife in our backs.)