Which of the following was a key cause of world war 2

The major causes of World War II were numerous. They include the impact of the Treaty of Versailles following WWI, the worldwide economic depression, failure of appeasement, the rise of militarism in Germany and Japan, economic downturn, revenge, hatred, Nazi ideology and Lebensraum, the rise of extremism and the forging of alliances and the failure of the League of Nations.

both believe in many god or polytheism

both built temples that they worshiped in both civilization's god were humanoid

both groups made religion a large portion of their lives

both believe in one religion throughout

the dead were buried with items for the afterlife