Zionism is one of numerous causes of the Arab-Israeli Conflict and the Israeli-Palestinian Conflict. Zionism is the philosophy that the Jewish people should have a nation-state just like the German people, Turkish people, Greek people, and so on. Without Zionism, there would be no State of Israel, and hence any conflicts associated with that state would not exist. However, the mere existence of the State of Israel does not cause conflict; the existence combined with its rejection by its neighbors for various reasons.
Almost all political systems in the Middle East have caused conflicts with the exception of liberal democracies (such as those in Israel or Turkey). However, the governments of both of those countries have fought in international conflicts.
Religious differences have caused many conflicts in the history of Iraq
Islam and Judaism
They have caused innumerable conflicts.
Zionism is certainly one of the causes of the Israeli-Palestinian Conflict. It is not the only cause of the conflict and is also not the most important cause of the conflict. Zionism is responsible for the existence of the State of Israel since Zionism was the Jewish Nationalist movement to establish a Jewish State in the Land of Israel. Without Israel, there would be no Arab-Israeli conflict. However, it is worth noting that while Zionism is a base cause of the Arab-Israeli conflict, numerous other far more lethal conflicts (like the Iran-Iraq War) have nothing to do with Israel.
I have not gotten into any conflicts in the Middle East and therefore there are no results to be had. If the question is asking about the results of the United States' involvement in Middle Eastern conflicts, please see the Related Question below.
Control of land in the Middle East by Palestinians and Jews.
Because there is no peace between them and not enough land and resources.
Being where the armistices to the Conflicts are drafted.
They divided people on the basis of religious beliefs, laws, and ways of life.
The UK has always been deeply involved with Middle East conflicts right back to the Crusades. Americans are newcomers at this.
Judiasm, Christianity, and Islam have the most adherents in the Middle East and therefore their adherents are embroiled in the largest number of conflicts.