Which casual explanation for the German actions in world war 2 is accurate?

One accurate casual explanation for German actions in World War II is the combination of economic instability, national humiliation, and the rise of extremist ideologies following World War I. The Treaty of Versailles left Germany with significant reparations and territorial losses, fostering resentment and a desire for revisionism. This environment allowed Adolf Hitler and the Nazi Party to capitalize on nationalist sentiments and propagate their expansionist agenda, leading to aggressive military actions across Europe. Additionally, the appeal of fascism and totalitarianism provided a framework for justifying these aggressive actions.