noor_elhuda, you might want to read some books before just shouting stuff. Too many people just think they can say stuff without thinking it through. Read stuff about the Cold War for example and how all kinds of events are related to eachother. It takes multiple factions to go to war. I'm sure you find that hard to believe because you're from a tiny, weak country but large factions such as Germany, France, the United States of America, Russia (former Soviet Union), China, Japan and a couple of others have way more influence all over the world. Therefore, they are active in way more "dirty business" than weak countries such as Egypt etc. (Even though Egypt managed to attack Israel and get beaten big time.)
Besides, the USA has prevented conflicts several times:
"During the Gulf War, Iraq fired 39 missiles into Israel, in the hopes of uniting the Arab world against the coalition which sought to liberate Kuwait. At the behest of the United States, Israel did not respond to this attack in order to prevent a greater outbreak of war."
And the USA is also part of securing peace regulations very often, usually after talks in Camp David for example. So perhaps you should lose the "good vs. evil" attitude and see things in perspective.