Sirius_Sir: Does anyone know or care to enter into the mind of Hitler to posit an answer as to why he declared war against us when he didn’t have to, and thereby virtually guaranteed his defeat?

By declaring War on America in concert with Japan, Hitler expected Japan to declare war on the USSR and open a second front in Siberia that would draw Soviet resources away from Hitler’s eastern front. It was not to be. Japan and the USSR did not become belligerents until the last few days of the Pacific war.