The true turning point of the war.
There was no rule that the US would have automatically got into the fight against Germany, which had no treaty obligations to come to the aid of Japan in this case. (Not that treaty obligations were much of a concern to Hitler.)
No, Hitler just decided all on his own, and for no particularly logical reason, to declare war on USA. The single act which doomed the Reich. Apparently never even really gave it much thought.
Considering the machinations of the Roosevelt administration over the previous two years to aid Britain [and then the USSR] in WW II, which under international law would constitute co-belligerency; I don’t find Hitler’s actions to be lacking in logic. They were, however, ill advised.