You know, you have no idea. Israel, the country, the land, was given to the Jews after the 2nd World War as a result of the Holocaust. Europe felt guilty, and decided to take away a great part of the land where Palestinians had been living for over 2 thousand years. Yes, it was originally home of the Jews. But, that does not mean anything; the world has experienced several changes during those years.
Secondly, as you should know, Israel is, to this day, occupying territory that isn't recognised by the UNO as being Israeli.This has been gained through the years, through the wars. Also, in response to one of your comments: war is not an accepted method, nowadays, of honestly gaining territory.
Thirdly, if you have ever been to Israel. Ok, every sign is in both languages, ok, you can form part of theknesset...However, arabs suffer from great marginalisation in every part of the country. They are being marginated in the country that THEIR ancestors lived in, unlike the Jews.
Fourthly, the fall of Berlin's wall was a great succes in the history of civilization: everybody agrees on that. However, you are supporting a country which is building a huge wall isolating many people, and breaking apart many families. Also, many people now have to migrate due to the fact that their fields have been isolated by the wall, unlike their house, so that they have lost all of their possesions. For the construction of this wall many houses have been bulldozed, but the things is that palestinians, unlike the Jewish illegal settlers, do not have anywhere to go.
With all this being stated, I think it is clear that Israel is acting like a bully, abusing the fact that USA helps them.