How did Zionism create conflict in the Middle East?

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.