Because some people are just mean, but just think, white people enslaved white people before africans were enslaved at all. In america africans are just known that way but we need to improve.
It is because they believe that Jesus handed down the bible to them and they have to protect it.
Explanation:
By mid-1941 the United States had severed all economic relations with Japan and was providing material and financial support to China. Japan had been at war with China since 1937, and the German invasion of the Soviet Union in June 1941 ensured that the Soviets were no longer a threat to the Japanese on the Asian mainland. The Japanese believed that once the U.S. Pacific Fleet was neutralized, all of Southeast Asia would be open for conquest.